So in the guild we been using this for quite long when you are in hyjal and got some dead people and its last wave some not fully buffed and you want to take the boss asap and not whipe cause of the damn trash wave that makes hyjal damn boring.
Use rogue's to Distract the boss when he is about to arrive if you got 3 rogue's you can make upp top 2 min's just to buff and rest and if needed to say tacs and put healing targets .
This aint an exploit dident know where to post it Just an usefull Tip.