I played through Foundry for the first time today. I healed through the fight without anyone going down. We did come close to wiping, but it wasn't all that bad.
If he kills in a single hit, you're either underlevelled or really lacking in gear.
Tried a class 4 mission now. Got a green-quality box, which gave me a profit of about 200.
So it seems that now you won't make a profit unless you find a green or blue box.