Zubr, if you're not a hypocrite and you really love RANDOM and CHALLENGE, then let's play in NNV.
Why? Because in this case, 2 mafia members and a serial killer won't engage in infighting; what's the point? If they kill each other, the town will win, as they'll finish off the survivor. Therefore, all the killers will simply go out at night and shoot two townspeople; during the day, they can, in principle, do an NNV (No Night Vote) for fun and only then start another round of infighting, in which, again, the blue team will have the best chances.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!