A thought:

Kagemusha versus Slashandburn?

A double-edged sword, there are downsides. Makes a known SK more powerful, but therefore a more likely mafia target.

Possible for Kage to win, reduce Slash's power, and we learn something new about Kage.

We lynch Slashandburn in due time anyway, and reveals no other strong roles in the process. If Slash is to be our pawn, put him to work, or do away with him, I'd suggest.