I decided to go back to Crypt of Decay even though it's no longer a hot zone and the mobs are still giving 4% AA per kill at 76 and are green. The mobs die extremely fast and with a lesson I can make 4-5 AA in 30min and 2-3 without. I can clear from the entrance through the entire Carprin Cycle area, assuming hes not up, in under 30min then I move onto he rat side and plow that. By time rats are all dead the undead are back up. With nothing but self buffs and a few clickies I can kill 5-6 at a time with zero risk.
At 76 I am 19k hp and 2947ac with just over 500AA.