I was tanking an S Rank and with full i180 slaying accessories (one i170 ring), with Zerk I saw a 9604 Equilibrium. It was fantastic because the healers in my group were DPSing and I was at 1/3 health, fun to go to full in one OGCD.

Another big stinker for Clemency, can't block or parry while casting, so using it during combat is a pretty big mitigation hit for Paladin.