How strong could a SK be?

[Coron]

I've done several things with SKs but they have the advantage of not having some of the mafia tells so it's not quite such a big thing.
Serial Killer almost won the second game I modded. In games I've modded there have been 3 serial killers and 1 of them won so I'd say in my experience it's not that bad.

I tend to give serial killers night kill immunity though, I think that makes it pretty balanced.