I think WAR could keep most of their self healing skills, just nerf them, Shake It Off's heal and regen should be removed, Storm's Path's heal could be reduced or even removed, Bloodwhetting and Nascent Flash should be capped to one heal per attack, and taken down to 300 potency for Bloodwhetting and 100 for Nascent Flash, Damnation to 200.

PLD, remove the heal on Divine Veil and Confiteor combo, turn Intervene and Holy Sheltron from regen to shields.

DRK, go back 7.0 heals

GNB, turn Heart of Corundrum and Great Nebula into shield effects, and take Aurora back down to 1 charge and 200 potency.