Originally Posted by
Slashley
Eerrrhhh? This sounds like massive bullshit, and _might_ only hold water with Lance Grids. Even then only for one off-element Lance. Maybe.
There is no way that adding off-element weapons will do you ANY good past extremely early game when you don't have on-element weapons yet. I'd like to link my damage calcs again, but sadly, neither of them have support for such details when it comes to survival like HP increase from Phantom weapons.
In any event, don't underestimate just how much 10% constant Assault or Defender is for your team. It easily surpasses Base Atk or HP gains. The point here is, the majority of your HP is going to come from Eidolons. Even if you focus solely on Atk and thus get use the little HP ones, and even if you run a Phantom Grid with full +99 weapons (like my Thunder).