The "Diplomat" scenario.

Buddy, at Hero level, with extended gameplay + new neutral creatures from the NCF project + neutral units from RMMS + having 6 dwellings – it’s more than achievable.

I don’t know what’s up with these mods; I played through this scenario in the original game, without any of that. I don’t remember 6 dwellings being there, although I didn’t explore the entire map, but I opened most of it using the cartographer, maybe I missed something in the dungeon. Besides, you can’t fight the mages, so you can’t completely clear the map.