Don't forget about their felhunter to remove all the buffs as a warlock, and warlock doesn't need to a spellsteal to copy a priest shield cause a warlock can use felshroud denomination to instantly sacrifice it for a shield up to 30 sec. After get out of resilence a warlock can pop his health stone to gain  about three-fourth of his health back. Don't forget about the siphon life, this doesn't will transfer 63 health from target to caster, what this means is that on a 5v5 area a lock can put this dot on 5 people and pets if there is any pets and you will get a very big heal that none other class will get.   

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