Being honest, I have no idea, my original idea was that his rifle can headshot, but its boring, hard to make, and overpowered. I might have to make something up like i did with engi and demo.
maybe give him a revolver and a the Tribalman's Shiv (one of his melee's), the revolver can shoot 6 times before getting a cooldown and the melee makes him able to attack when they get close
he also has 1 extra ennemy stage before the hall attack triggers so he can use the melee (that or make it so the current last phase is the one you can melee on)
the revolver can crit with a headshot on the last shot and if you land the crit the reload get's shortened
BUT it is at the cost of of increasing the ennemy tension by 20
basically a revolver that can do some good damage and do a crit in a pinch at the cost of reload time and tension and a melee for really bad moment's (also the reload system could be made in a way like for the railgun from engineer exept it slows the firerate to almost nothing after 6 shots instead of changing due to hp)