In my opinion, there are races that will almost always have an advantage on any map, and there's nothing you can do about it. As for the AI, there's nothing you can do about it either; to get the most enjoyment out of the game, it's better to play against a human. If there aren't many human opponents, I can create a version where 1 player is allied with 4 others. The map crash is definitely not due to the size; it's more likely due to the effects in the center of the dungeon, which I had to give a negative height. Thank you for the valuable comments; there's a lot to work on here.
Friend, am I doing something wrong? There's no central island in the dungeon. And on the mini-map, you can see 4 straight lines - passages, but there's nothing on the actual map. Absolutely nothing. It's just an empty space.