I've been using this build... and I'll say it. If it gets close, it's an utter monster. Haven't finished Basics in it, and I just scored...
The artemis makes a huge difference. My prototype was using standard guidance and switching lowered the time to kill considerably. I don't have the 350XL so I am using a 325XL no ferro. Your design looks good although the amount of ammo stacked in the LT is bothersome. I would crit buffer with at least one DHS.