Which version is better for D? Costume or regular?
Regular does extra damage against ice, costume gives EDD to ice. I vote extra damage as better given you most likely won’t benefit much from EDD (more applicable in tournaments).
Costume comes with undispellable buff. That’s probably the biggest differentiator to me.
Regular is rogue which I’d say is better than costume being sorcerer.
I’d be more likely to use her costume on offense, so I’d emblem her for sorcerer path. That would make me use costume for defense.
Regular is better on defence
Regular for defense, costume for offense and titans