Mafioso, non-immune Serial killer, arsonist, jailor, vigilante, and doctor is left alive. A standard 1v1v1v3. Arsonist has the jailor, mafioso, and doctor doused. He's going to burn tonight, but you don't know it. You're the vigilante in this makeup, and jailor and doctor don't know to believe you or the mafioso.
What do you do?
*EDIT: Arsonist is immune. And targets know they're doused.
**EDIT: Also, you do not know who is who between the Serial Killer and the Arsonist.