I think they should add %healing+ to defiance, change Wrath to Crit and a small overall dmg mod (let WARs have 20% dmg red. @ 5 stacks), and change most WAR healing skills to function like Thrill of battle. IB, Bloodbath, Storm's - they all heal for a value, and add to maximum health for the same value for a limited duration - allows both reactive and proactive tanking that doesn't screw the healer too much. If that's OPed then let everything increase max HP by 50% of the amount healed or whatever you have to do to get it balanced.