Probably best to ask this one on Atari Age, more 8bit users over there. Or in the MiST subforum here.
I could try pulling my MiST out and try it on there, I think it requires 48kb of ram for AR: The City, and I know at least the Dungeon will use up to 128kb.
Atari 8Bits: 800xl, 600xl, XEGS, 800, 130xe, 130xe (VBXE, U1MB, Stereo POKEY)
Atari STs: 1040STf (broken shifter), 1040STe, Mega STe, TT030, Falcon (CT60e, SuperVidel)