Well that's why you never use a Regen until after a tank is finished pulling. Wait until he's stopped and has aggro on everything, then pop the Regen and the extra healing is nice alongside Benefic spam. I usually just make sure they have a Stoneskin up before they pull and unless they over pull or are undergeared it should be fine.
But there's something about that one big pull near the start of AKHM that no matter what healer I'm playing on, I always get tanks that can't live through the entire thing. Even on my WHM with Divine Seal up. I think it has something to do with the fact that that 2nd pull is iffy if the tank isn't perfect and most end up pulling the entire hallway so keeping them alive through the start of it is very difficult. That paired with the fact that in Duty Finder, you're playing with ilevel 110, so you don't overgear that dungeon by all that much.
