Well, on the very run I found 2 grenade launchers, I also lost them because I ran out of matter and got pummeled, and actually got farther running away with flight units >.> That was fun in an "oh god why, someone save me and give me energy/matter" kind of way
Haha! I'm not surprised you ran out of matter
Using two grenade launchers, while totally awesome, will destroy most items and matter if you over use them (plus the launchers
use a lot of matter anyway!). Maybe three grenade launchers at once will help
Speaking of, are there any non-annoying places to get flight units? Shooting Swarmers is downright painful, while blowing up Swarmers en masse with explosives damages the loot
zxc has good advice. Haulers are a high-priority target for me and will often hold gear that is rated above what you would normally find on that level.
Another way to take out swarmers if you want their gear is to use choke points and limit their line of fire.