I think there will be quite a bit of Localization involved to lose all those Dark prefixes.. would make autotranslate for these abilities rather annoying. If I could choose at the moment, knowing what little we know:

Grit => Bravery
Darkside => Deathbringer
Dark Arts => Darkness

Just a few Tactics and FFXI references.. idk.. At least Souleater made the cut, that's enough to please me.