I honestly believe there are 5 scum. Rule of thumb is 25%
I might've overstepped my knowledge there some. I am still rather new to Mafia.. but I do think 20% if pretty common, balanced by town having weaker powers. And I would think normally, you wouldn't want Mafia to be able to vote on their own without any town help.. but yeah, guess I could be wrong about it.
I believe the goal is to find out who is scum and lynch them with the 10 votes. I mean, it'd make sense. If there are 5 scum and 14 town, 10 of the town lynch 1 scum before the deadline, the scum can't pile on townies during the day as they'd lose a vote and have the rely on night time.
Good point, it could be 5 and still be balanced.