It can pull from a shortened list: kreck, gracken, mi-go, or amoebic blob. Of those, krecks can be a starting-level hazard, mi-go are an early-to-midgame hazard, and grackens/blobs tend to live and let live. (Grackens have melee 10, but tend not to go Hostile! IME.)
I regret that you’re having difficulty, though I also regret having to put up with complaints from folks that corpses are free loot. So if you’ve got a better idea for a quasi-guard that provides a better difficulty curve, let me know.[/quote]
I could see zombie soldiers around soldier corpses instead of mi-gos. However, nether inhabitants do seem appropriate for dead scientists.[/quote]
We already have zed soldier spawns at milcorpses. Roughly a 1/10 chance per corpse that it’s a zombie instead. Same with scientists and drug deals.