Generally, we, a group of six, can handle three opponents, unless we do something incredibly stupid. Like executing two inactive players in a row, or something similar.
Added 4 minutes later
To be honest, this Mafia game is more challenging than the previous one because there's relatively little information available, and most of it consists of clues, which I'm completely clueless about. I'll look for them tonight, but I can't promise anything. Please don't vote me or Krabby as Mafia just because of our activity – we have a strange schedule, and sometimes we might just sleep all day. In any case, we need to execute someone today, and I think it will at least give us some insight into the psychology of the players, whether they are townspeople or Mafia.