This is 1-forma [Carrier Prime] that is an excellent companion for Steel Path. The [Accelerated Deflection] is for casual Shield Gating. Also, Enchanted Vitality, and Primed Regen for additional durability on Steel Path. Then, I use Primed Animal Instinct for the loot/[Enemy Radar]. The Synth duo mods give me Holster reload and Health orbs, the armor is nice for its value too. Also, [Looter], Vaccum, and [Ammo Case] for more utility. I didn't use [Sanctuary] because I can go invisible under operator mode to revive allies.

Flexible Options:

1. You can replace Looter or Accelerated Deflection with Sacrifice, Guardian, [Medi-Ray], or Shield Charger.
2. I have replaced Assault Mode with Striker, you can use what you prefer.

Sweeper Prime build: https://overframe.gg/build/485975/

Below are some guns, that desperately need Ammo Case.

Personal Felarx build: https://overframe.gg/build/499713/felarx/ultimate-sp-felarax/

Personal Phantasma Prime build: https://overframe.gg/build/468146/

Note: Here is my immortal Djinn sentinel for endurance runs https://overframe.gg/build/523929/