Well, for what it's worth, I think Khush is right. He may always be mafia, but Bulk and Skull can end the game at anytime. The less players around the better their odds. If you keep killing townies and only get down to the last mafia member, that'll leave 7 players. 2 will be them, so that's 5. The Rita/Zedd will be obvious at that point so now it's 4. If they both get a guess then that's a 50% chance of success by them. Plus, they can end the game at any time.
In trusting Khush's judgement, I'll vote stevey