Other notes:
1)
The game should have at least one Mafia or Werewolf group (of at least two members). A second anti-town group can be given a separate Mafia family name, or can be a Werewolf group. There should be no more than two mafia/werewolf factions, and no more than one Serial Killer.
I think that means you have to restrict scum flavors to mafia/werewolf, not virus or the like
2) Banned:
Anything resolving with a random element
A n0 town action is essentially resolving with random element since no one knows any alignment
Like, wrt the symbiotic role, I think you can probably construct something that reasonably resembles what you want (except the n0 bit), but I think that both of these things are explicitly non-normal and would be issues. MAYBE it'd be as simple as making it an action that happens at whatever night the player chooses (obv not n0), unless that causes a different problem?
Showhttp://wiki.mafiascum.net/index.php?title=Mhsmith0
Conq: you, sir, are great at being town.
BATMAN: Only jugg was the only one we didn’t scum read at least not me
Quick: There is little to no chance this slot is Power-Wolfing.
SR: I want to give him a day
Life is simply unfair, don't you think?