Phantom Mode like in SC2

Its like FFA and Good vs Evil,8 or more players, 3 classes which 2 Phantoms(Evil), 2 Paladins(Good), the rest are Slayers(Normal). The aim of the game is that the Phantom's job is to deceive everyone and kill them. While Paladin's and Slayer's job is to kill the Phantom.
-RULES-
1) You will win the game if the Slayers/Paladins or the Phantoms gets eliminated
2) Phantoms and Paladins have a income bonus
3) The classes will be chosen at random, no one will know who they are unless you look at their income
4) Everyone is allied together at the beginning and each player can kill everyone
5) Invisible units cannot be seen by allies(so that Phantoms can strike)

Unfortunately, we dont even have enough standard FFA at the moment. You'll find the diplomacy in FFA is prettymuch the same anyway, because there are players with a large advantage over everyone else, but its all about deception. You must appear strong enough that people dont want to mess with you but weak enough that you arent a threat to them. Given the difference in player skill level, there isnt much need to enforce this using game mechanics, it is a natural consequence of who gets rushed/who gets extra territories/etc.

Would you like Slayers and Paladins(bonus) vs Phantoms(A bit more bonus)
or Slayers and Paladins vs Phantoms

also that is the only way to tell the differences between the classes.