I clear the beginning mesh later part wih Fatebringer, P&T, and my swarm. I use the swarm to kill captains, sniper to kill vandals, and Fatebringer for most mobs. After clearing I switch over to Thunderlord and pick up all heavy ammo and toss on a black hammer for devil walker. Once he's dead, I make sure my thunderlord is fully loaded and move to sepiks. Put in all my thunderlord ammo, and believe it or not swap to the necrochasm. Pretty good on arc burn and when used on shanks it shreds their shields. My sniper is still black hammer and I put back on my swarm invade of heavy drops.