Positioning is definitely the most important thing for arsenal mercs,
In huttball, positioning yourself on the upper platform is usually the best,
Civil War, on the edge of the outer turret platforms, or the upper platform in center
Void Star..... haha.... away from the door, by the pillar, and hope they dont LoS you
after that, it is just a matter of figuring out where to throw in rapid shot, unload, explosive dart, etc between your TM spam, railshot, and HSM