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I played through this wonderful map again after so long, this time with a Warlock. At first, it was difficult due to the lack of spells (a magic wand saved me), especially since I was leveling up the hero specifically for Chaos magic from the beginning. For most of the map, I still had to rely on Elven Archers, as in the previous playthrough, because the mage's attack power is not sufficient for most battles at that level, although some battles involving archers/sorceresses with high initiative but a small amount of HP were won with the help of invisible Griffins and Chaos magic. Overall, the impression from replaying the map is still very positive; thank you to the author for creating it. I've attached screenshots of the statistics, in case you're still interested:
https://imgur.com/a/yzA7kqH