I think there's one major issue with this map – the "clone" spell. I just thought about it.
If you use this spell every turn, an extra turn with 40 Archangels will easily decide the outcome of the battle!
Given that even Barbarians have a magic power >40 and the first castle has "Chain Lightning," instead of a necklace +3 skills to all hero attributes, I put a "lightning resistance" necklace on him. :) And as a result, there's no point in playing a hero who specializes in Chain Lightning on this map.
There's a catastrophic lack of money! I accumulated a lot of troops