Supply the game with two angels, and let them work together at night, just like the mafia. They agree by consensus who is to be checked out. They choose only one person oer night, and they both know the results of the investigation. In this variant, the death of an angel doen't totally remove that angel's knowledge from the game. Also, fraudulent claims to being an angel will be tougher....

Note - We have not yet tried this variant.