In this guide I will be going over the basics of lying as an evil. I will not be going into each evil specificity. Also don't use this guide as jester or executioner this is to help you as mafia nks or the witch.
Lying doesn't come naturally to all. But with this guide no townie will ever see through your bluffs.
Acting: Acting as an evil is simple. Most townies realize how to play the game and are there for quite all game. As an evil you should be even more quite than other townies and there for look more like a townie. Never speak and just vote with the masses but be sure to have a good will to show to the town. To make it easier to be quite in chat go turn on a movie while the game plays.
when to speak: As an evil the only time you should say something is when you or your teammates being accused or you are voted up. When somebody accuses you or your teammate be sure to call them an executioner if you do the to will ignore the TI that called you out 9 out of 10 times. If your being voted up be sure to complain about there being no proof of you being evil post your will (or not) and watch the town vote you down.
What to claim: There are many roles to claim in this game. Some bad some good some risky but only one role is in your invest results. When claiming look up the investigator results and claim from there. This way the investigator will not call you out on your lies ever. The only time you should claim something else is when the claimspace doesn't allow for your role to be in game.
Well done now you know how to lie. Be sure to try this in high ELO, report your results on the poll and suggest what I should make a guide on next.