I just want to point out this incredibly lucrative OSP (On Site Procurement) run in Let It Die.
55k Kill Coins, 755 SP Lithium, 2 Hover Metal, 2 Scratch Metal, 1 Bone Metal, 3 Wool, 2 Leather, 1 Hemp, 2 Cotton, and 2 Bronze Skillshrooms.
This was a very, very good run! I tend to do these when I'm running short on funds in the game. I'll take a character, start with nothing, and usually climb to about the 10th or 11th floor. That means I kill 3 mini-bosses, 1 main boss, and cover a hell of a lot of area. One of these days, I should see how far I can go. I bet I could make it to Col. Jackson...