Inner Beast
Delivers an attack with a potency of 260.
Ignores the 35% damage penalty inflicted by Defiance.
Can only be executed when Infuriated.
All Wrath is lost when used. Additional Effect: Absorb HP

Bloodbath
Converts 25% of the damage dealt by next successful offensive ability into HP.
Duration: 15s (Bloodshower 30s)

Mercy Stroke
Delivers an attack with a potency of 250. Can only be executed when target's HP is below 20%.
If delivered as the killing blow, up to 20% of your maximum HP will be restored.

Regarding mitigation and sustain RI/Bw has a % mitigation on too. In most cases south of savage tankbusters, there's no functional difference because very little hits harder than a wet noodle. As previously mentioned vengeance is another skill that balances offense/defence - thematically it'd be nice if its damage out also scaled off damage in, but I can imagine that being just about the worst possible idea to implement.