Quote Originally Posted by Mercbeast View Post
Boosting in dungeons is most commonly not done by tagging. The 60 just plows the instance. Works best as a mage or warlock that can kill the entirety of say SM cath in a single pull.

Edge case scenarios in open world will exist, but they will be often few and far between due to mob density. Not a lot of places are going to have the mobs/respawn rate to support that rate of killing. Of course, if you find a spot like you have, tagging is going to be best. That's going to be true mostly for powerleveling a single character. If you want to powerlevel 4 alts, dungeons with mage or warlock fragging everything is going to be best.
cath can't be done in a single pull on a warlock. I have a decked out warrior full prot with mostly raid bis + force disk and he still cant pull all of cath in 1 pull without being killed, even while being healed with a 60 priest. I do however think warrior is actually the best booster if you have the right gear/consumes/engineering.