“Alternative League” is a mod that replaces the Dungeon faction.

No way? Well, technically, the first 3 levels can still be completed using skills. And there's also the Tome of Darkness. Unlike Orcs, magic isn't completely forbidden. If you want, you can even experiment with a non-Necropolis hero if the map allows it. The lack of convenience in the form of light/dark, in my opinion, only makes the situation more interesting.