The town is doomed, so let it end sooner. Cancel the Nightly Nuke Vote. Stake Revan in the chest.
Thinking out loud: no, of course, the maniac can check me tonight - it's not fatal to me. But the problem is that he will lose his chance, which he could have used to find the maniac or, at worst, the mafia.
Where do we end up when we save the world?