Swashbuckler-- Bad ass as always, don't really think it needs any comments. VERY EXPENSIVE
Distortion Opportunist -- Definitely noticeable. Between swashbuckler and distortion opportunist together, you can make a very dodgey bard, and the combination works out with amazing success. VERY EXPENSIVE
Perfect Pitch -- Like the comment all ready says-- Cheap, worthless, can't do without it.
Killing Joke -- Comedy Repertoire boost. Very expensive, but VERY MUCH WORTH IT. Having one of the worst fiends possible that enemies kill in one round to having one they can't stop fleeing from. Apocalyptic overture hit as if you had an Epic repertoire. Once again: Largest increase is in fiend. Becomes very viable. If you go comedy-- This is a must have.