It's funny you mention Corsair, since it's basically everything most people want RDM to be (In Role, not Method), and it's OP as balls. It's an enhancer that can put up extremely high damage while still buffing a party with unique uberbuffs.

The only reason pirate hasn't been hit with a nerfstick to rock the ages is the fact that it cannot directly heal itself or others aside from Regen, which takes up a roll slot and the natural limitations of luck-based rolls themselves.