Preferably have someone that is either Evangelo or Holly. These two make the runs way easier by just dashing to Narnia.

From testing out multiple levels that aren't that much of a pain to complete, even though you'll be playing it on the easiest level. BAD SEEDS is an ideal level to farm as it's really short to complete.

Speed. Anything that gives you stamina, speed, and or efficiency. You don't have to fill in the deck if you don't have enough mobility cards, just put in as many and leave the rest blank. This will default to giving you stamina, health, ammo, and copper cardss.

Just book it dude. shouldn't take no longer than like 6 minutes, on average without having no one die on you like those noobie baby mans you should get roughly 50 or a little bit more supply points. Just rinse in repeat after beating it. You'l defintely get more if you are playing on a harder difficulty.