4 piece Vigilante set bonus
Punch through for condition spread
Pick your flavor of paired element to go with the innate cold.

Use your [Primed Shred] on your actual weapon if you are using a rifle.

Save the need for an extra forma by reducing the load from the [Vigilante Supplies]. You don't need the ammo for your sentinel anyway.

Even better, reduce other mods and save the only forma on here. No need to be as try hard as I am.