It would probably be a smart idea is the mafia do fail to kill tonight to just keep Zorax alive so the killing power doesn't transfer and then we can keep the mafia quiet during the night time.
If he is the godfather we won't be able to kill him anyway until someone else dies I assume, unless he had one time lynch immunity or something, that's just going by the fact that he didn't die during day two, so if no kills are made overnight nothing's going to change.