Ares mainly self-buffs her atk and gives herself a faster burst gauge growth rate. Her only offensive skill deals fire damage five times to a random enemy.
Sol has an AoE atk down skill which I already unlocked. My other light units also have a single target atk down offensive skill.
And doesn't D'art already have an atk/def debuff skill?
I'll probably aim for D'art first and then decide whether I should go for Sieg or Mordred next.