I stopped boosting this instance for the XP cause it was a bit of a pita for me. I boosted with a lock and there's a bunch of mobs that are immune to shadow, that meant no instant casts. When I was boosting my tactic was have the slaves following at all times and I would just run through the instance tagging the mobs with siphon life (before they changed it to combine it with corruption). Meant I was constantly getting health back and I could life tap to replace my lost mana...no down time. I found RFC better for my needs as it was more convenient to get to, plus the knock down wasn't too much of an issue I'd rain of fire those groups...pretty much 1 hit.