He is an idea that could be put into game play.
It's a basic skill tree concept of three classes. In order of unlocking with points 3 skills each with it costing 1 additional point for the skill so 1 point for the first skill ending with 3 points in the last.
Attack Class: Higher Amount of ammo kept on hand, High Mags, 1+ Damage to self and allies in a certain radius.
Defense Class: Ability to use manned turrets (if implemented can be changed), can set mines/traps, -1 damage negate to self and allies in a certain radius.
Support Class Reloades faster, Running speed improved, faster rate of fire for self and allies in a certain radius.
Only one class can be taken at a time and requires the first skills to be learned first. Additional points can be added this is only an idea.
I have in mind that any abilities learned can only be used in missions or wars not future spar or arena.