Just a few spitball ideas:

BloodBath: 20% hp healed over 20 seconds 90 second cooldown Off global cooldown does upto a 300 potency attak, the lower your hp the better the attack

Stormspath: combos with overpower aoe cone up to 5 targets each target hit restores 1% of your hp grants 1 stack of wrath

Berserk: increases damage by 50% not attack power

IB: restores 20% of your health (that maybe op?)

Foresight: Creates a shield that is equal to 10% of your health (it could block all of that up front, or could reduce incoming dmg by a percent until that shield is used up Not sure what would work better)

fracture: 100 potency attack causes paralyze last 10 seconds.