A buddy of mine realized a fun thing. If you, say, want to main autocannon, recoilless, or have any of the assistant backpacks, equipping the resupply pack stratagem is still good as a secondary resupply.
You pick it up, resupply yourself, maybe a few teammates, then just drop it for your main BP and move on.
It's kinda obvious but it was huge for us when we connected the dots.