Pee-on = Simple, tiny filler units not much use in any format, but in a tourney, they can help close the 30 points extra
Pawn = Useful, but should be sacrificed if need be
Warrior = a powerful soldier, nothing special here, but Warriors work well as midgame fighters
Assassins = Sneaky units capable of evading enemy lines and eliminating key opponent units
Generals = Usually a OM drop unit who should be protected at all costs
Hulk = Insanely powerful and used to approach an enemy and crush them with massive rolls
Special = Units with unique abilities that make them invaluable on the battlefield