Yes, I can say it is useless. It is extremely useless right now and if they ever fix it to where it works then guess what, I'll be using it. It seems like 90% of this forum is allergic to min-maxing for the current state of the game, if something is better why not use it? "NO WE WILL WEAR OUR VIT BODIES AND DEFENSE SHIELDS WITH HONOR THAT YOU DON'T HAVE YOU DIRTY FOUL EVIL HORRIBLE OBSCENE HP STACKER" is all I read. Why the are you even saying that you'd choose taking 1500 damage over 2500 damage regardless of HP pool difference (pro tip, only chest and shield can have defense materia and head can't have HP so the HP difference won't be 1000), any moron would do that.

Gold coffers and the roaming nms that no one ever does? Yeah buddy, you got me there.

tl;dr
HP is best for now and probably along time after
WAR > PLD
actual useful endgame content: two primals and two dungeons
world nms are for frolicking around and enjoying the sights of a digital world.