Garrison

https://c2n.me/4bqCJuk

Won!
Collected and cleared everything possible.
Forgot to take the abandoned mine, just didn't notice; there are only 14 mummies guarding it.

I had 90 squires; there was a week of alliance right after the capture.

If you know what you're doing, squires are the only dwelling you can take on the map (the hut is inaccessible) that will provide troops. I'm not really counting on diplomacy.

The hero is weak for a hero; he won't gain a single level, so it was pointless to take chests for money.
By the way, I have a question: is there an alternative Walkthrough here, where you defeat the Orc and then take the garrison?

You can still wait for the "Tomb of Darkness" and risk going that way for fun. There's no monolith exit there; there's a different, more difficult garrison.
Despite the lackluster leveling and 0 spells, you can still play this way.