I have found yet another level pacing for mission 2.1, and it's much better than my previous one. I cleared the entire underground on day 1, then went tigerbeetle hunting just before night 1. During night 1 I was able to kill all hermit crabs that wandered the surface.
The only way I could have done better, is if I had ignored the lowest food on day 2.
I still think mission 2.1 insane has too much breathing room compared to mission 2.2 insane.
The only way I could have done better, is if I had ignored the lowest food on day 2.