Not like the T-1 models from terminator, though an upgrade tech that switches between them for higher damage and defense would be cool). Give them pretty high health to represent numbers.
Psionic armies: Should have the highest morale damage, and pretty decent moral themselves, give them pretty good defense (a la jedi precognition). Devastating against basic armies, slaves and clones, horrible against robotics.
Xenomorph armies: The highest damage rating, and second highest morale damage rating. High health, very low defense however, and is immune to breaking. Ravenous flesh eating monstrosities shouldn't quit till absolutely dead. Give them limited efficiency towards towards psionics (they can't be frightened by mind games but can be confused is my logic.)
Gene Warrior armies: second highest attack, morale damage nearly as good as xenomorphs, very, very high morale, very, very high defense. Basically as super soldiers they should be best overall, but not necessarily best at each stat. Should be able to take out xenos and psionics easily for example, but combined arms force of both xenos and psionics would be a challenge for them to face.
Stupid phone typing messing up my posts!!!!