Actually to fix war i'd say add a line onto Defiance.

"All of your actions that generate HP (Bloodbath, IB, Storms Path) scale depending on how much damage you have sustained over the last 10 seconds."

There you go. WAR's mitigation now scales according to incoming damage just like PLD's.

Whereas PLD is a defensive tank popping cooldowns mainly to counteract WAR becomes offensive and has to maintain rotations and TP to keep itself up in the mitigation charts.