I thougt of a Merc that is a scientist possibly on the chemic side. My idea for his ability was a crossbow (not my final idea but some kind of shooting device with slow moving projectile for balancing) that shoots Arrows that explode on impact with mercs and deployables and releases acid. This acid will make debloyables not work anymore and the can not be picked up anymore. For mercs if you hit them they take some inital damage (not to much maybe 20) and then some damage overtime (again not to much because that is not the point of the ability) and they can not be healed for a certain ammount of time. I first thought of a mad german scientist, if some of you like the idea itself i can post more about it and if i am able to (with my crapy art abilitys) try my best to make some pictures of what i think the merc should look like. For the role itself i first thought of a engineer but maybe. I also thought of some balancing aspects and weapons for the merc, so if you like it i will post more ideas.