Well that little chart should make it easier to stat out the troops. Any others you want me to take on?
So from what I see, you want them statted as long range assailants that use psychic powers to hide themselves.
I'm thinking that they can only be attacked in an assault, but loose that option while they are in combat.
simplify: they cant be shot unless an enemy is distracting them.
What armor do you think they should have, and what race do they belong to?