If a tank dies to 1 group of mobs and feels that they need a single regen to live, they aren't popping any cool downs. I've been spamming the current highest dungeon with the tank pulling wall to wall and I'm barely even using regen. Just benison, asylum and assize are more than enough. Especially with the stun from holy. The mobs are dying faster than any of them can do 3 autos. Helps having dps that know how to aoe. It really isn't hard to do mass pulls and have everyone do dps if everyone just does their job even half competently. Out of 3 runs, I did 1 gcd cure and that's only because I was messing around with my friend and rescued them into an aoe.