minor change. but considering Auditor, an evil role, has separate options for Mafia and Triad interactions, I don't get why Sheriff can't have the same.
It would make the rare 8331 save with the lone rival gang (3 triad save with a lone mafia possibility, or 3 maf save with a lone triad possibility) a bit more bearable for the lone rival, since people can make Sheriff detect the dominant gang but not the lone rival.