sorry you had a bad experience with your subsequent runs.
back when I was leveling in HW through The Vault I prefer to use SCH myself so that I can leave Eos near the tank and focus on spot heals with the others who probably panicked as I did whenever we get chains or once the knights show up.
as WHM I find constant regen easier to manage so that I can also move around, then med II before aoes. but that duty is really a challenge. you'll get your revenge soon when you can finally solo it at 70 xD
good luck!