Dota 2 - Lifestealer Build Guide

BIO
In the dungeons of Devarque, a vengeful wizard lay in shackles, plotting his escape. He shared his cell with a gibbering creature known as N'aix, a thief cursed by the Vile Council with longevity, so that its life-sentence for theft and cozening might be as punishing as possible. Over the years, its chains had corroded, along with its sanity; N'aix retained no memory of its former life and no longer dreamt of escape. Seeing a perfect vessel for his plans, the wizard wove a spell of Infestation and cast his life-force into N'aix's body, intending to compel N'aix to sacrifice itself in a frenzy of violence while the mage returned to his body and crept away unnoticed. Instead, the wizard found his mind caught in a vortex of madness so powerful that it swept away his plans and shattered his will. Jarred to consciousness by the sudden infusion of fresh life, N'aix woke from its nightmare of madness and obeyed the disembodied voice that filled its skull, which had only the one thought: To escape. In that moment Lifestealer was born. The creature cast its mind into dungeon guards and soldiers, compelling them to open locks and cut down their companions, opening an unobstructed path to freedom while feeding on their lives. Lifestealer still wears the broken shackles as a warning that none may hold him, but on the inside remains a prisoner. Two minds inhabit the single form--a nameless creature of malevolent cunning, and the Master whose voice he pretends to obey.

INTRODUCTION
Naix is the best jungler in DotA, he can jungle conveniently since he’s Level 1. He use lifesteal to survive in jungle. Like his name, Lifestealer is the best lifesteal-er in DotA, all his skill are designed to maximize his lifesteal ability. That makes him one of the best one-by-one hero in DotA, he never lack of HP because he always receive new HP from stealing others.

PROS	CONS
A decent jungler, can start jungling on level 1, and jungling easily	Only attack a single target if you don't buy a BattleFury or get any cleave skill.
Free Bkb / Magic Immunity
A very good 1 on 1 hero
A decent damage bs a high HP-ed enemy
Can go inside your friend and surprise the enemy
Can kill creeps instantly

ROLE

Melee - Carry - Durable - Jungler - Escape

STATS

LEVEL	1	15	25
HIT POINTS	625	1,263	2,099	SIGHT RANGE	1800 / 800
MANA	195	514	1,001	ATTACK RANGE	128
DAMAGE	57-67	91-101	135-145	MISSILE SPEED	N/A
ARMOR	2	5	11

ABILITIES
1. Rage

Launch into a maddened rage, becoming immune to magic spells and gaining increased attack speed.

MANA COST: 75/75/75/75	COOLDOWN: 15
ABILITY: NO TARGET	ATTACK SPEED BONUS: 30 / 45 / 60 / 80
DURATION: 3 / 4 / 5 / 6

The madness and brutality of N'aix makes him a vicious and unrelenting foe in combat.
Rage is a skill you use to carry your team into victory. With this skill, you gain an additional attack speed that will make you to deal lots of damage to enemy. The most important is: You gain magic immunity during the duration of this skill. With the magic immunity, you will be inuvlnerable to magic and become an outstanding hero in a teamfight.

2. Feast

Regenerates a portion of the attacked enemy's current HP and deals the same portion of damage per attack.

ABILITY: PASSIVE

LIFE LEECH: 4% / 5% / 6% / 7%

After escaping from his cell in Devarque, N'aix subsisted on flesh and bones of those unfortunate to cross his path.
This skill is your main lifeteal skill. You need this to do jungle on early-mid game. With this skill, you can survive in jungle and get enough farm to get nice items for becoming a carry for your team.
This skill depends on enemy's HP, the more his HP the more your attack. so if you fight a thousands HP enemy on late game, this skill will really helps you.

3. Open Wounds

Lifestealer rends an enemy unit, slowing the victim's movespeed and allowing all allies to lifesteal on that unit. All damage dealt will steal life, including damage from spells. The victim recovers movement speed over the duration.

MANA COST: 110/110/110/110	COOLDOWN: 24/20/16/12
ABILITY: UNIT TARGET	AFFECTS: ENEMY UNITS
LIFE LEECH: 15% / 20% / 25% / 30%	MAX SLOW: 70%
DURATION: 8

Fresh wounds and the scent of blood often draw out the scavengers to finish the job.
Slowing sown your enemy, this skill makes you can easily catch your opponent. He (your target) will be slowed and cannot run from you. Also, the attacker of your target will gain an additional lifesteal whether it is a magic attack or normal attack. With this, skill, and combined with Feast, your lifesteal will be so high and can absorb so many HP from your opponent.

4. Infest

Lifestealer will infest the body of the target unit, lying dormant and undetectable inside. When he reveals himself, he deals damage to all nearby enemy units. The Lifestealer can gain experience from units that die while he is Infesting a unit. If the unit is a creep, he will devour it first, gaining health equal to the unit's current HP. Does not work on enemy Heroes.

MANA COST: 50/50/50	COOLDOWN: 100
ABILITY: UNIT TARGET	DAMAGE: MAGICAL
DAMAGE RADIUS: 700 / 700 / 700	DAMAGE: 150 / 275 / 400

With this infestation, N'aix consumes the life blood of the host, restoring him back to full unholy power.
Going inside a unit, creeps (ally or foe, or jungle) and hero (ally). With this skill you can do fast farming in jungle because it will make your target instantly explode and you get the gold and experience, very good to use infeest on big creeps like Centaur, Wildkin, Troll, etc.
This skill is also deal damage near the explosion after you consume your target. So it is also a decent damage dealer to initaite a temfight and fight enemy.
For initiating with this skill, go inside your friend and if he already arrives and attack your opponent, come out, it will deal damage to all nearby enemy. Don't afraid, your friend will not exploding like a creep.
This skill is also useful for escaping. If you are on a difficult situation and must run, you can go inside the creep and stay there. usually enemy will follow the creep where there are you inside it. You may call your friends to help you and save you from the enemy.

5. Consume

Lifestealer eats the host body from the inside out.

ABILITY: NO TARGET

SKILLBUILD

Level 1: Feast
Level 2: Open Wounds (Use this if you are on low HP and almost killed by the creeps, and keep attacking the creep, because you gain an additiona lifesteal from this skill)
Level 3: Feast
Level 4: Rage
Level 5: Feast
Level 6: Infest
Level 7: Feast
Level 8: Rage
Level 9 : Rage
Level 10: Rage
Level 11: Infest
Level 12: Open Wounds
Level 13: Open Wounds
Level 14: Open Wounds
Level 15: Stats
Level 16: Infest

Level 17-25: Stats

If you want to steal firstblood, take Open Wound on level 1, it will sow down enemy so your team can kill him.

Why maxed Feast first?  You need this mainly for jungling. With this skill, you will be able to survive in the jungle. With the lifesteal, you can survive and not killed by the creeps.

On late game, this skill will helps you to survive in the teamfights vs. heroes.

Why maxed Crystal Nova before Arcane Aura? Rage before Open Wound? You will need the extra magic imuunity duration for rage for your defense in teamfights. And Open Wound Level 1 is enough for early-mid game.

STRATEGY

Early Game

Once the game start, I recommend you to straight go into the easy camp in the jungle. (Don’t make yourself visible in the easy camps right in sec 30 into the game, or you will waste your time waiting there). Quelling Blade + Stout Shield + Feast is enough to kill the easy camp in level 1. Keep fighting the easy camps after you are ready to fight aother creeps. Maybe at level 3-4 you already have enough ower to fight vs Stone Golem or Ogre. And in level 5-6 you can fight Centaur, Troll, etc.
Hand of midas is considered a good item for you. With mudas, you can get exp and gold faster than without midas. Very recommended to buy this as your 1st item.

Mid Game
Keep jungling is the best option. Why not? You are the best jungler in Dota, you can jungle easily and become the highest level + the richest in the game. After you have your boots (Pt is recommended) and maybe you already level 10+, you now can farm the ancients. Ancients give the most gold than other camps (except Roshan). Very recommended for you to focus Farming in just 2 main location > 1. Ancients, 2. Large canps the nearest to the ancient camp. With just focus farming in these location, and keep calm, you will reach enough gold to carry the team. Also remember to use Midas to big creeps like Centaur, Wildkin etc. And also if you want to be faster in farming, use Infest to creeps, it will instantly kill the creeps and don’t  waste your time attacking the creeps.

Late Game
On late game it is your time to shine. You are the carry. You are the one who will save your team from loss. Carry the team into victory. You should already have some nice items that will deal lots of damage to enemies. There is many possibility for Naix. You can buy Desolator+Mordiggian  or you can buy Tarrasque + Mkb or Basher?
There are lots of  possibilities for you. Just choose one you are into it and carry your team with it. The key of successful carry is: be focus on one target, focus, and focus. Right click the right target, not the creeps. And after you succeeded kill your target, you can change to another target.
Oh I almost forgot, you can initiate a teamfight by using Infest into your friend, and come out if your friend already near the enemies.
Infest also useful to run from enemies.

ITEMBUILD
Starting
(Quelling Blade, Stout Shield, and Tango)

 This is your full equipment for Level 1 Jungling. Quelling Blade to deal damage, Stout Shield to Block damage, and tango for HP regeneration.

1.  Hand of Midas
Total cost: 1400
Recipe: Gloves of Haste + Recipe

Active: Transmute - Kills a non-hero target for 190 gold and 2.5x experience. Cannot be used on Ancients. + 30 Attack Speed Cooldown   100

Why Hand of Midas? It will boost your golds and exp so you can be the richest in the maps.

2.  Power Thread
Total cost: 1900
Recipe: Gloves of Haste, Boots of Speed, Belt og Giant Strength/ Robe of Magi/ Band of Elvenskin

Active: Switch Attribute - Changes selected attribute between Strength, Agility and Intelligence. Flat movement speed bonuses from multiple pairs of boots do not stack. + 55 Movement Speed + 8 Selected Attribute   + 30 Attack Speed

Why Power Threads?  Power threads is a flexible shoes, you can change it to STR, AGI, or INT for what you need.
STR for damage and Survivability, this can save your life by using the STR Thread if you are on low HP and run from enemy. Add +152 HP instantly.
AGI for attack speed, or
INT for mana, this can give you instant 104 Mana if: You are need to last hit enemy hero and if you don;t use your skill, he will escape.
For Naix, for stable use, choose the STR, then if you need to cast a skill and on a low mana, change to INT.

Usually people choose this as a Naix core early-mid item.
3. Armlet of Mordiggian
Total cost: 2600
Recipe: Gloves of Haste + Blades of Attack + Helm of the Dominator + Recipe

INNACTIVE	ACTIVE: Unholy Strength
+ 9 Damage +15 Attack Speed + 5 Armor + 8 HP Regeneration Cooldown: 2	Total Damage = +65 (9 Normal Mode + 31 Active Mode + 25 from Strength) Total Attack Speed= +25 (15 Normal Mode + 10 Active Mode) Total HP: + 475 Additional: +25 Strength +31 Damage + 10 Attack Speed Drains 40 HP per second. You cannot die from the health loss when the bonus strength is gone, or the health drain per second.

Why Armlet of Mordiggian  It will gives you damage,  attack speed, and HP instantly. A very good skill for a carry-tank like you. Deactivate Armlet if not in a teamfight.
Can Save your live if you are below 500 HP and enemy want to nuke-kill you. Use this to instantly adds 475 HP.

For all melee carry and don't hava a natural cleaving ability, this item is a must have.
4. Battlefury
Total Cost: 225
Recipe: Broadsword, Claymore, Preserverance

Passive: Cleave - Deals a percent of attack damage in a 225 AoE around the target. Does not work on ranged heroes. Cleave damage on non-primary targets is not reduced by armor values. + 65 Damage + 6 HP Regeneration     + 150% Mana Regeneration      CLEAVE DAMAGE: 35%

Why Battlefury? Cleaving attack is a must for late game teamfight. You need a fast attack speed, cleaving high damage. This is what you need to knock-down all enemies. Also if you misclick your target and you attack the creep, or if you are back-out and can't think in a teamfight. Cleave attack will save your face.

And for Survivability in a Late Game, you can buy these items:
5. Heart or Tarrasque - Assault Cuirass

Total cost: 5500 Recipe: Reaver + Vitality Booster	Total cost:: 5300 Recipe: Platemail, Hyperstone, Chainmail, Recipe
Passive: Health Regeneration - Restores a percentage of max health per second. This ability is disabled if damage is taken from an enemy Hero or Roshan within the last 4 seconds if your hero is melee or 6 seconds if your hero is ranged. + 40 Strength   + 300 Health     HEALTH RESTORED: 2%    Cooldown: 6	Passive: Assault Aura - Grants attack speed and armor to nearby allied units, and decreases armor for nearby enemies. Multiple instances of Assault Aura do not stack. + 35 Attack Speed     + 10 Armor       AURA ATTACK SPEED: 20 AURA BONUS ARMOR: 5                ARMOR REDUCTION: 5

Why you need Survivability on a late game? Late game rule is: Who can survive in a teamfight, is the winner. So Survivability to winning a dotA game.

For a carry, DPS is always not enough.

8. You can increase your DPS more. Choose your own DPS items.As a carry, damage is your priority.

	DAEDLUS	MKB	ABYSSAL	DIVINE RAPIER
DAMAGE	81	88	100	300
ABILITY	CRITICAL 2.4	100% HITS	STUN	NONE
CHANCE	25%	MINIBASH 35% DAMAGE: 100	MELEE: 25 % RANGE: 10%	NONE
OTHER	NONE	+15 ATK SPEED	+10 STRENGTH 2 SEC STUN	NONE

DAEDLUS: Daedlus will provide you with the a powerful Critical Strike.

MKB: 100% HITRATE will helps you to fight some evasion heroes like Mortred or Rikimaru.

ABYSSAL: A decent +100 damage and makes you become a Stunner

RAPIER: Be careful if you choose to hold this. 1 hit kill is a sure. 2-3 hits is the worst. Need protection from your support. Must come if the situation is clear safe for you to come inside the teamfight. Need disabler friends.

And this is a must for late game item:
10. Boots of Travel
Total cost: 2450
Recipe: Boots of Speed + Recipe

Active: Teleport - Teleports you to an allied non-hero unit or structure. Flat movement speed bonuses from multiple pairs of boots do not stack. + 100 Movement Speed Manacost: 75   Cooldown60

Why Boots of Travel? With the creeps becoming more powerful in pushing your base, you need fast teleport to save your Ancient.
Also, this item will give you 1 free slot that is saved for Teleport Scroll if you don't have this Boots

GOOD ALLIES
1. Supportive Heroes
(Example: Shadow Shaman, Crystal Maiden, Vengeful Spirit)

Supportive heroes have disables and nice skill to helps carries and makes a teamfight easier for the team.

Shadow shaman: Have hex, shackles, and wards to helps you disables enemy

Crystal Maiden: Have 1 lockdown, 1 slower, and have +mana regeneration

Vengeful Spirit: Have stun, swap, and +damage aura

WHAT HERO TO INFEST?
A. An Initiator
(Example: Enigma, Magnus, Earthshaker)

Enigma: Scenario: You infest him. Then, he jumping into enemy's crowd using Dagger and then he use his Blackhole. While enemies is being sucked, you come out and dealing AoE damage, and then kill all the enemies
Magnus: 1. Have + damage and cleave to increase your damage.
                2. Scenario: You infest him. Then, he jumping into enemy's crowd using Skewer or Dagger and then he use his Reverse Polarity. While enemies is being stunned, you come out and dealing AoE damage, and then kill all the enemies
Earthshaker: Scenario: You infest him. Then, he jumping into enemy's crowd using Dagger and then he use his Echo Slam. While enemies is being still surprised, you come out and dealing AoE damage, and then kill all the enemies

B. Good Initiator Hero to Ride on
(Example: Spirit Breaker, Storm Spirit)

Spirit Breaker: This hero will take you ride by you going inside him. Then he can chase an unlucky target and together with
him, kill the chased target.
Storm Spirit:
He can move fast as lightning with his ultimate, ride him!

C. Global Teleport:
(Example: Furion, Spectre, Tinker)

 They have global teleport and you can ride on them and teleport freely.
(For tinker, he don't have a natural ability to always teleport, but with his ultimate + Boots of Travel he can always teleport anytime

D. Invisible Hero
(Example: Rikimaru, , Gondar, Clinkz)

 Become invisible and surprise gank your foe by riding on an Invisibility hero.

E. A Flying Naix

Infest his Hawk and you can fly like a bird

BAD ENEMIES
1. Huskar

Your lifesteal depends on enemy's HP, the more his HP the more your attack.
But Huskar is different, he get more outstanding the less HP he have, the stronger he become, the weaker you become, how's that!

VIDEO SECTION
1. Lifestealer Guide

Also watch this guide of Lifestealer

2. Dota Lifestealer Deutch

Watch this too!

FANART

Dota 2 - Treant Protector Build Guide

BIO
Far to the west, in the mountains beyond the Vale of Augury, lie the remains of an ancient power, a fount of eldritch energy nestled deep in the high woods. It is said that the things that grow here, grow strangely. To the forces of nature this is a sacred place, made to stay hidden and unknown. Many are the traps and dangers of this land--all-consuming grasses and crossbred fauna and poisonous flowers--but none are so fierce as the mighty Treant Protectors. These ageless, titanic beings, charged with keeping the peace in this dangerous land, ensure that none within encroach without reason, and none without poach their secrets. For time untold they tended to their holy ground, uninterrupted, only dimly aware of the changing world beyond. Yet inevitably the wider world grew aware of this untamed land, and with each passing winter the outsiders grew bolder. Soon they arrived with tools to cut and with flames to burn, and often the Treants would ponder: who are these fragile, industrious creatures? What now had become of the wild, green world? There came and went an age of questions and of doubts, a thousand summers of long traditions set to scrutiny, while more and more the outsiders died and fed their earth. When all that bloomed had finally finished their say, curiosity had overcome caution. It was decided: a lone Protector would be sent into the wider world, and instructed to wander until the glaciers arose once more, to observe the changing land and its creatures, and to discover what unknown dangers could threaten their sacred ground.

INTRODUCTION
Trean Protector is a hero that have a role as a support and initiator for the team. He can makes allies become invisible, he can also heal allies and even towers, that is what makes him a good supportive.
He have Overgrowth that can disable enemies in area. That is what makes him a perfect initiator.
He have lots of HP and armor, that is what makes him a good tanker.

Treant Protector, a strong green tree that protects it's friends.

PROS	CONS
Can heal a building	Low mana pool
Can also heal allies	Slow attack speed
Have a global spell to protect allies
A strong initiator
A good tanker
Have a decent damage

ROLE

Melee - Durable - Initiator - Lane Support - Disabler

STATS

LEVEL	1	15	25
HIT POINTS	625	1,503	2,510	SIGHT RANGE	1800 / 1200
MANA	221	549	1,043	ATTACK RANGE	128
DAMAGE	71-79	117-125	1xx-1xx	MISSILE SPEED	N/A
ARMOR	1	5	11

ABILITIES

1. Nature's Guise

Causes the targeted unit to blend in with the forest, becoming invisible to enemies and gaining a movement speed bonus when near a tree. If the unit moves away from a tree or the spell is cast on a unit with no nearby trees, Nature's Guise is lost. Treant Protector can cast spells and remain invisible under Nature's Guise.

MANA COST: 90/80/70/60	COOLDOWN: 10/8/6/4
ABILITY: UNIT TARGET	AFFECTS: ALLIED UNITS
DURATION: 15 / 30 / 45 / 60	FADE TIME: 2
TREE RADIUS: 375 / 375 / 375 / 375	MOVEMENT SPEED: 10% / 10% / 10% / 10%

The Protectors don't often come into vision; their natural state being nestled within their leafy brethren.
Makes you become invisible and should position yourself near trees to keep you invisible. Can be casted to allies.
This skill is a defensive skill that can be use to save someone who is in danger and needs help.

This is also an offensife skill to initiate a teamfight. You have Overgrowth that need you to be in the center of the enemies, you need this to sneak into the center of the enemies and then cast Overgrowth.

This also can be casted to you and your friends and then initiate a teamfight together with invisibilities.

2. Leech Seed

Treant plants a life-sapping seed in an enemy unit, draining its health, while simultaneously slowing it. The seed heals friendly units around it equal to the amount drained. Pulses 4 times.

MANA COST: 140/140/140/140	COOLDOWN: 18/16/14/12
ABILITY: UNIT TARGET	AFFECTS: ENEMY UNITS
DAMAGE: MAGICAL	DAMAGE PER PULSE: 30 / 45 / 60 / 75
MOVEMENT SLOW: 24%	RADIUS: 500
DURATION: 3

Rooftrellen nurtures the beings under his stewardship, sustained by the lifeforce of trespassers into his sacred ground.
Place some vines into enemy's body, slowing him and damaging him, and also healing nearby allies. A good skill to chase enemy. You need this to chase enemy who is trying to run, he will feel some pain, and also be slowed down. And while he is slowed, your team can easily kill him. You get an additional HP from this skill, not bad.

3. Living Armor

Infuses the target hero or structure with a protective coating which grants bonus regeneration. Also grants physical damage block from damage from heroes. Dispels when a number of damage instances are taken.

MANA COST: 25	COOLDOWN: 15
ABILITY: UNIT TARGET	AFFECTS: ALLIED UNITS
DAMAGE INSTANCES: 6 / 6 / 6 / 6	REGEN: 4 / 7 / 10 / 13
BLOCK: 20 / 40 / 60 / 80	DURATION: 15

The roots and tendrils of the Treant Protectors are far-reaching, stimulating the growth and rejuvenation of all of nature.
Regenerates HP for some seconds. While having this living armor, can block some damages and saves your allies lives. Can cat this sglobally, that means that while you are far away, you can cast this to allies and keep him alive. This is the only skill in dota that can regenerate tower's HP, very good for defense.

4. Overgrowth

Summons an overgrowth of vines and branches around Treant that prevent afflicted enemies from moving, blinking, going invisible, or attacking.

MANA COST: 150/175/200	COOLDOWN: 80
ABILITY: NO TARGET	RADIUS: 625 / 625 / 625
DURATION: 3 / 3.75 / 4.5

Rooftrellen calls the ancestral spirit of nature, releasing its power through all of his kin.
Your ultimate. This skill makes you can summon some vines to all enemies around you and everyone whose being affected with this skill, can't attack or run. Very good skill for initiating a teamfight. With this skill all of your friends can comfortably attacking the enemies.

SKILLBUILD

Level 1: Nature's Guise
Level 2: Living Armor
Level 3: Leech Seed
Level 4: Leech Seed
Level 5: Leech Seed
Level 6: Overgrowth
Level 7: Leech Seed
Level 8: Living Armor
Level 9 : Living Armor
Level 10: Living Armor
Level 11: Overgrowth
Level 12: Nature's Guise
Level 13: Nature's Guise
Level 14: Nature's Guise
Level 15: Stats
Level 16: Overgrowth
Level 17-25: Stats

Why take Nature's Guise and Living Armor in level 1 & 2? These 2 skills provide defensive mechanism to defend yourself and allies in the beginning of a match. Very useful to avoid firstblood.
(But if you and your friends decided to get firstblood on level 1, you can take Leech Seed to slow down the enemy.)

Why Leech Seed maxed first? This is your main nuke. you need this for slowing down enemy heroes.
A nuke is more powerful in early game when everyone still have a low HP.

Why maxing Living Armor before Nature's Guise? A level 1 Natures Guise is enough for early game to give survivability to escape in dangerous situations..

STRATEGY
Early Game

If you are the main supportive role then buying courier and wards is your priority. Ward is so important for the team to check the runes and also to keep you aware of enemy's gank attempt.

What you need to do on early game is helping your friends. That's because you are considered a supportive role. A supportive hero needs to protect their carry.
You can do it by giving a living armor in every dangerous situation. You also need to tank the damages if your carry is being targetted by the enemy. You may use invisibility to keep your friends alive.
You can use living armor to save your towers too

You may lasthits  if only your friend is not a carry.

Mid Game
In mid game, what you need to do is participate in every gank activities and teamfight activities. You have Leech seed to slow down enemies and can kill him together with your friends.

Because you have Overgrowth, you are a decent initiator. You need to at least catch 2 heroes with this skill. You can use your Nature's Guise to sneak into the middle of enemy's crowds and then cast Overgrowth there, and let your friends kill all the enemies. Remember to use Leech Seed to anyone whose run away from your team.

Remember to always replace the wards. Your team will always needs the vision of certain area. Roshan area is the most important place to be spotted. You can place another wards on enemy's jungle.

Late Game
On late game. The teamfight will be very intense. Beware! if your team lose a single teamfight it may cost you the game.
You should already reached high level here so you have an all high level skill and also an already high sats, HP and damage. And so does ebverybody in the map. And also with the high level, that means a long respawn time. That means that every move is becoming more important and decisive. So keep focus and also don;'t panic at every sitaution. Always think clearly and use all you have.

Here you should make a wise decision to choose btween 2 options:
1. To save money for buyback
2. To buy your next item
How to choose between those two? you may see how important is your next item. You can see it by: If you don't buy that item immediately, your team's can't compete with the enemy's power so buy it immediately, but if the item is not that important, you should save for buyback.

In late game, your main part is to initiate a teamfight. You are being a true teamfight initiator here. Your main skill here is: Overgrowth. If you can catch 3-5 heroes with Overgrowth, your team will be have an easy victory because your team can easily kill enemies who are being Overgrowthed.
You can use Blink Dagger or you can use your invisibility skill Nature's Guise to initiate a teamfight.
Always remember to use the Leech seed for enemy hero who escapes.

And if your team won the teamfight, you have two options:
1. You can get the Aegis for your team's main hero or
2. Your team can push enemy base and destrouy their buildings. Choose wisely!

ITEMS BUILD
1. Arcane Boots
Total cost: 1450
Recipe: Boots of Speed + Energy Booster

Active: Replenish Mana - Restores mana in an area around the hero. Flat movement speed bonuses from multiple pairs of boots do not stack. + 60 Movement Speed + 250 Mana MANA RESTORED: 135 Mana Needed: 25    Cooldown: 55

Why Arcane Boots? You have spammable skills, so you need more mana. With this item, your mana will be fulfilled. And also to replenish mana of your team.

2. Vanguard
Total cost: 2225
Recipe: Ring of Health + Vitality Booster + Stout Shield

Passive: Damage Block - Gives a chance to block damage, depending on the type of hero you are. + 250 Health   + 6 HP Regeneration   BLOCK CHANCE: 70% RANGED BLOCK: 20    MELEE BLOCK: 40

Why Vanguard? Will reduce physical attacks damage. So good for a tanker like you in teamfight against the  physical attacks.

3. Blade Mail
Total cost: 2200
Recipe: Broadsword + Chainmail + Robe of Magi

Active: Damage Return - Returns any damage you take to the unit that dealt the damage. Lasts 4.5 seconds.  + 22 Damage   + 5 Armor   + 10 Intelligence Manacost: 25   Cooldown; 22

Why Blade Mail? After you initiate a teamfight, your opponent is likely to target you. So you can reflect their damege using this item.

4. Blink Dagger
Cost: 2150

Active: Blink - Teleport to a target point up to 1200 units away. If damage is taken from an enemy hero, Blink Dagger cannot be used for 3 seconds. Manacost: 75   Cooldown: 14

Why Blink Dagger?
1. Perfect for initiating a teamfight
2. Helps you escape in certain situation

6. Refresher Orb

Total cost: 5300
Recipe: Obilivion Staff + Preserverance + Recipe

Active: Reset Cooldowns - Resets the cooldowns of all your items and abilities. + 5 HP Regeneration + 200% Mana Regeneration    + 40 Damage    + 6 Intelligence Manacost: 375     Cooldown: 160

Why Refresher Orb? It will makes you can cast your ultimate: Overgrowth 2 times, that means 9 seconds disable for the entire army of the enemy if you can catch all of them.
That's the same as, automatically win the teamfight.

7. Radiance
Total cost: 5150
Recipe: Sacred Relic + Recipe

Active: Toggles Burn Damage on or off. Passive: Burn Damage - Deals damage per second in a 650 radius. + 60 Damage BURN DAMAGE: 45

Why Radiance? Helps you deasl some constant damage in teamfights. Also helps in farming creeps.

GOOD ALLIES

1. Carries
(Example: Magine, Void, Luna)

Carries should come after you initiate a teamfight, and they should the right click and use all their skills to the enemies.