I always hated running solo endless missions because of how few enemies would spawn, but solo survival was especially painful because you needed life support drops.
However now that I've unlocked Steel Path, solo survival is my favorite! Since you get as many enemies spawning as you would in a full squad no matter how many you have, solo endless missions are a lot more fun on Steel Path. So many enemies spawn that it's always dynamic and exciting, I'm constantly running and shooting.
However, the drop rate of life support packs seems to be way, way lower. In solo regular survival, I can stay at 90%-100% oxygen at all times without much trouble, even with the low numbers of enemies spawning.
But in Steel Path Survival, even though I'm killing dozens of times more enemies, I find my life support dropping lower and lower no matter what.
I'm in a mission right now, I just passed the 5 minute mark with 433 enemies killed, and my life support is at 53%. Now that's obviously not terrible, and I can regularly hit 20+ minutes on these missions by supplementing with the life support pylons, but I'd like to be able to go longer if I wanted.
Sometimes when I look at builds on Overframe or wherever, they'll brag about getting "300 KPM" or something similar. Do you really need to hit those numbers in order to do long runs in Steel Path Survival? Should I be aiming for more like 1000 kills at 5 minutes, or even more? I feel like I'm killing enemies pretty much just as fast as they spawn, so I don't even know what I could possibly do to more than double my performance if that's what it takes.