First off, no, you're wrong about mitigation and prevention. 100% mitigation is prevention, but that doesn't mean it's no longer mitigation. But why you resort to arguing semantics is beyond me anyway.
Point two, hitting 5k hp on a PLD is extremely easy. 3 DL Jewelry, 3 DL armor, and the rest AK will probably be well over 5k. Fully decked out is ~5500 HP outside of a group and ~5600 in a group, depending on your race.
Point three, WAR does not have (significantly) higher HP. They have 85 more HP base. Once in defiance a WAR will have 25% more HP. Once in shield oath, a PLD will have 25% more HP. Either way they will have the same EHP assuming both have the same gear. Unless you're talking about a PLD in sword oath then yeah, they will have less but they will also have more DPS.
I think it's funny that an AF1 Dragoon thinks he knows something about other classes though.
