This is my setup :
Godfather
Mafia Random
Mafia Random
Any Random (Allow killers, exclude Town)
Amnesiac
Neutral Benign
Town Core
Town Core
Town Investigation
Town Investigation
Town Protective
Town Protective
Town Power
Town Random
Town Random
Though this looks weird, the setup is actually not unbalanced as it depends on how good the players are.
Any random : The 4th Mafia, The neutral killer, Witch / Cult, The 3rd Benign.
Mainly, the setup is to make most stay while maintaining variety. The town looks favored so the few citizen would be more likely to stay, so role-quitters are less likely to occur for me.