Minimum Level Available: 20
Type of Talent: General Pet Enhancement
Description
Most of the time, when a Warlock calls his summoned demons 'invincible', it's really just part of a large Warlock-wide inside joke.
The scary part is that some warlocks are actually serious...
Functionality
If you rely on your pets to tank for you, this is the most required third tier talent in the demonology tree after that point in 
[Fel Domination]. A level 60 Voidwalker will have somewhere in the neighborhood of 3700 HP. 15% on top of that is not insignificant.
Notes
4-5 ranks can mean 1-2 more hits required to kill your Voidwalker up until the end-game instances. When combined with 3 ranks of Improved Voidwalker it actually makes him an excellent soloing tank so long as you don't spam shadowbolts from the outset of the fight.
5 ranks will make a serious difference in the staying power for your Felhunter when you're fighting higher-level caster mobs because more HP means it will take them more spells to kill him, which in turn gives them more chances to re-cast their defensive spells which Felhunters love to devour.
The Succubus and Imp won't get as much out of this talent as the other two. They benefit more from 
[Fel Intellect] than Fel Stamina.
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