Arsenal is too easily shutdown because people are not reacting appropriately when they get attacked. All they want to do is spam TM. That's all it is TM TM TM, Unload, Railshot, TM TM TM, rinse repeat.
Yeah as if someone is gonna let you go and spam that from the back row. Same people who used to press 1 button for wins are now crying for a buff.
The spec requires 3 tracers. Bioware designed it that way. Without the stacks merc dps is laughable.