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I finished the map; I'd like to point out a few bugs I encountered.
1) A cutscene pops up every time you enter a castle.
2) Empty huts (near the sphinx and the sacrificial altar).
3) The one-way portal behind the turquoise border guard doesn't work (it seems to be intended to lead to a demon, so I could only get there through the console).
4) The demon himself: he needs an army and a higher level; otherwise, he stands there with his level 13 and 50 dogs, plus some other minor units.
5) Increase the army for the hut on Necromancer territory (15 zombies are not enough; the starting mines are better guarded).
6) And, in my opinion, a mentor could be added.