Making it a DoT would make it no different from Sonic break in GNB, As Mikey says, making it an AoE with falloff would be a more interesting approach (as DRK/GNB/WAR have their 30s-ish cds split in single and AoE). Although I wouldnt be opposed of it beign a DoT if it kept the usage cooldown

Perhaps upgrading goring blade into a Halone themed animation with ice, such as the attacks she does, or making a new animation would be more satisfying

Im of the oppinion that Attonement charges could have recieved an AoE spender. Perhaps adding 3 swords behind the shield gauge instead of the buff we currently have to have a nicer way to track them