What bothers me the most about eye of the dragon is that none of the element choices except poison have what I'd consider a "basic ability". So here's my suggestion:
-Remove Stunning Blow from the relic altogether.
-Move every first ability except Venomous Bite from the primaries, into new categories for them under secondaries(Heat Wave would be the ability gained from choosing Fire as your secondary element, etc).
-Give Heavy Blow to Impact primary, and give the hybrid 85 power moves to Fire, Ice, and Electricity primary.
-I want to suggest that Dark primary should get one of the upcoming Emit attacks as its new first ability, but that may conflict with the philosophy of the relic(since this would make Dark primary a pure magic choice).
-Upgrade Cursed Slash to the cleave variant after moving it into Dark secondary.