Probably the simplest solution is to remember that it's a multiclass feat. Into a versatile and odd class, but a multiclass nonetheless.

Look at the other multiclass feats for rough power equivalents, or if you're feeling lazy just rip another multiclass feat's ability straight and reflavor/tweak it slightly. Ranger and Paladin come most obviously to mind; it's not hard to think of fresh new flavor for "I do a bit more damage" or "I do something to harry and distract him".