ah that big ones we don't knew where the came from in the first place..
well, I never needed to taunt them. lucky me, eh?
anyways... why makes that debuff from deathwisper taunt useless?
you taunt her, start making aggro. when you have 2 or 3 debuffs (whether you have 3 or 2 tanks), you get it taunted off from you. taunt = instant 100% threat + mobfocus on you. that debuff reduces threat generation. taunt generates 0 threat, it simply puts you on #1 if you aren't already. thats all. So it does not affect your possibility to taunt...