To simply match the passive mitigation from PLD's Shield Oath, I believe that a WAR would need both +25% HP and +25% healing as a passive on Defiance. Not a 15% bound to Infuriated which vanishes if you actually use our self-healing, Inner Beast.
We should also mention that if you burn your Infuriated status on Inner Beast, you either have to immediately use the skill named Infuriate to get the Infuriated status back, which has a CD of 60 seconds. If that's not up, you have to stack Wrath up slowly for 12.5 seconds until you get the status back which gives the +15% healing bonus which is still worse than what PLD naturally has just by having Shield Oath up and standing there doing nothing.
Once that is in order, we can talk about how PLD can Block, also has Rampart, Sentinel, and Hallowed Ground, not to mention their Flash puts Blind on mobs, plus they have Enhanced Convalescence, and also Rage of Halone puts a debuff on mob damage dealt.
And after that, then we can talk about how Vengeance is useless, Storm's Eye is useless, Bloodbath is useless, Steel Cyclone is useless, Unchained is useless, and Berserk has Pacification for 5 seconds after it wears for no good reason except Squenix says fuck you Warriors.