Thinking about this some more, I think I thought of something. What is the mimes' win condition is to both die the same way?
That is, if one is NKed, instead of suiciding, the other mime needs to be NKed. That keeps the mimes in the game longer. Mime is still a pro role, of course, and win chances are definitely less than town or scum, but it adds to it.
I'd do this:
2 mafia goons
2 mimes with a factional JK
1 watcher
1 vig
1 VT cop
5 VTs
That's a 12 player game -- the vanilla cop gets vanilla/not vanilla results, all players other than VTs return "not vanilla" which could be town PR, scum, mime...
Mimes win when both are dead the same way or with two consecutive no lynches.
Goons win when all town members are dead or they control half the town.
Town wins when all scum and one mime are dead.
I could get behind the mimes dying the same way thing, someone suggested that elsewhere I think, but I don't think it got any response.
Why make the no-lynches consecutive though? Town doesn't have many legitimate reasons to No Lynch more than once anyway.
Also, why not make town have to eliminate all the mafia and mimes? That still allows the weird situation where Mimes auto-win near the end, but it's even less common because both scum have to be dead and vig dead and both mimes alive, or the dead mime has to be dead by NK with the vig dead and the mafia dead.
I don't know, it seems pretty hard to achieve, but is still a slight boost to the mimes.
And I think "all non-town eliminated" is a more natural town wincon anyway.
I do agree that we can eliminate the backup Vig if Mimes can win by both being NKed, town is more likely able to get one Mime dead by NK and lynch the other or something. And that makes the VT cop more useful.
Do you think the both-Mimes-as-JK is too strong for Mimes? Or just like it as more natural because it's akin to the Mafia night kill?