Also, we can use demons mechanics against themselves.
For example, if you are blackmailed, you can just ignore demon's message and die at the end of d2. That will give a lot of info for town. Much more then if you will dance to the tune of demons (is there some expression like this in english? hope so) and give desinformation for town or vote someone.
Also, remember the genie (or jinnee?) tactics. Be the good wishmaker for demons. If the wording of their message can be interpreted in any way in two ways, do it. Turn your inner lawyer ON if you are blackmailed and don't want to sacrifice yourself ;)