WAR's self-heals are fine as they are, since they're kind of part of it's identity as a Berserker that rather than having high defense they just regenerate faster than enemies can do damage.
But maybe for party heals, maybe remove the partywide Heal and HoT from Shake It Off and lower the potency of Nancent Flash...
Or MAYBE... Reduce their CDs and increase potencies and just swap the class to a Healer role.