attack power: is it useless?

[Vanguard319]

What about LNC's STR vs. ARC's DEX?

Generally it is assumed that STR:Attack has 2:3 ratio. In ARC's case it might be DEX:Attack, as it has been demonstrated that DEX affects ranged attack damage.

I heard about that as well, but that was not what I was asking, What does attack power do, and does it actually do anything for arc? Don't answer if you don't know.