I'm running 5 locks at the moment, and I've only had a couple of my guys die once, when hogger respawned on top of us while we were taking down one of the camps in that area.
I'll be getting my voidwalkers tonight, and I can't wait to get to westfall now.

Things keep dying like flies around me, which is quite fun. Personally I pull with immolate (All 5), and if there are multiple targets, I will immolate them all up before going back to my first target should it still be alive. I am planning to change that from tonight, as I got curse of agony just before I logged out.
Open with immolate+curse of agony, then curse of agony on all the other mobs, go back to start and SB them down one by one.