I’ve wanted to do an underground city for some time, and I don’t see getting away with an underground city with no Duergar. Thus, I dug out the old 1e MM2 and mashed that together with the dwarf and hobgoblin entry in ACKs to try and get something decent.
Comments are appreciated, in particular there are two things that I did as sort of guesswork that may warrant further consideration. First, I counted the duergar spell-like abilities as (*), which may be too much. Second, I upgraded the per company treasure from D (1000gp avg.) to the next hoarder level H (2500gp avg.). My reasoning is that, as statted, the Duergar are worth a good deal more XP than dwarves and yet I cut out many of the NPCs that would be carrying magic items.
Besides that, you may notice the cheeky comments about Derro, Drow, and Devils. If anyone has ACKsified stats for any of those creatures, It’d save me some effort!