ptechs are gods in huttball, its ridiculous what one ptech with a decent brain can do to an opposing huttball team, and on most servers, empire seems to get huttball 75% of the time, so ptechs are better in that light arsenal mercs do good damage if you actually put some thought into your positioning, but i think they need a sort of "blessing of freedom" (temp immunity to slows), some kind of root, or a sort of "force speed" mercs can also tank a lot of melee (knights/warriors) and just outdamage them if knockbacks are down