Sigh some posts come up after my long one. Well I'll address a few things I saw.

A. Serial Killer is bullet proof, and doesn't side with mafia, he is an independent party.
Only in the last game. We don't know if he is or not in this game as well. Last game it was a measure given to serial killer to make them have a chance to win for once.

Also the assassin bit, I'm not positive on it, but I thought they could do the night action of the mafia during the day by themselves. I believe the flash read (though someone double check to see) that they used the night kill of the next night for mafia as a day kill instead.

With a day vig in out midst though I'm willing to bet that the other night killing faction is a serial killer, as 2 mafia kills in a night is way over powered I think, unless town has some VERY nice power roles, which thus far are Day Vig, Inventor, masons, and govenor and maybe a Bulletproof townie.