these two roles would go hand in hand:
* Politician - there are about 8 or so public gathering points (such as squares and town halls) in the city/town that the Politician can give speeches at. The Politician picks the location the night before, and in the following day post, everyone is told where the Politician gave a speech (unless the Politician is lynched that day). If the Politician is lynched, the day post goes something like this: the Politician talks everyone out of killing him and instead talks them into lynching another random person (ie, randomly rolled by the host)
* Assassin - this is not related to the Mafia in anyway, it's an independent politicial-assassin-type role. Each night, the Assassin chooses one of the ~8 locations to set up at the next day, and if the Politician chose that same location, the Assassin assassinates the Politician and wins the game