https://www.ign.com/articles/helldivers-2-cutting-edge-premium-warbond-goes-live-adds-new-weapons-gear-and-armor
Helldivers 2’s new Cutting Edge premium Warbond is live now, adding new weapons, gear, and armor to the smash hit PC and PS5 co-op shooter.
I watched some gameplay of the new weapons. Looks like the Sickle is amazing, but the rest are meh. Stun grenades could be good for stopping hordes or the Bile Titan long enough to line up a 500kg orbital strike, but they can't destroy bug nests and don't last that long. Also good for disengaging from a horde hot on your tail..
Armors with 95% protection to electricity are also niche now, but I think the Illuminate enemies in HD1 had electric weapons, so the utility might come later. Or if your specific crew is running all arc weapons.
For what it's worth, approx 50hrs in-mission time has given me 2400 super credits. Enough for the first premium warbond, this new one, and 450 left over which I'll put towards the next one. You seriously don't have to spend a dime in this game.
I've grinded some credits for maybe 4 hours and just played the game. Got 2500 credits left, both battle passes and 2 armors with helmets from the superstore.
Just start a trivial mission, go to all points of interest (usually 8 to 13) and after last poi just leave to ship. Rinse and repeat. The best missions are the ones without a bug objective, so raise flag or activate pumps. Bot missions are also good. Pick a map without debuffs and good vision. I recon you can get 300+ super credits per hour.