Ooh, Marcstick is tricky to pull off in Lake especially against the toasters. A majority of my runs die there.

When the timing doesn't work out, what is your backup fighter to keep Big Blue in the air without losing too much momentum/avoiding failing the level? Mine are Stickobi with Saber Toss, cutting it off after the initial Saber Toss attack, and Steric later on.

I definitely think sub 20 is possible, especially if Moon Prison could be optimized. I find that level the hardest since the Cobalts are so tanky. Can't wait to see your run!