*Not necessarily in order, change the deck around to suit your preference.
Three free slots.
This deck is designed for the sniper/AR role position in your team who's in the back. Use spotter designation on someone else to combo with this damage build which will highlight special ridden for you, and increase damage against it. With 2 is 1, you can carry a sniper and a powerful AR/LMG to kill hordes or special ridden with 3-4x penetration, nearly 200% damage, and 100% weakspot damage to remove threats before they can alert enemies on Nightmare (such as snitchers).
If you prefer shotguns, adding Rolling Thunder and/or Buckshot Bruiser for additional damage or resistance.
Add Wooden Armor for trauma resistance but you should be far back enough to rarely take damage.