I completed the scenario with this hero. Dark magic of enslavement and berserk were a great help; I won by hiding in a town and using high-threat demon troops. The only problems were with the mages – I had to replay the scenario about ten times because of their magic reflection ability and their defense in the town. I didn't complete any secondary quests and didn't fully explore the map. I defeated everyone like that. The map is excellent, but I think it's a drawback that the necromancer Giovanni behaves passively and doesn't attack the towns of order, which allows you to ignore defense and "divide and conquer." Demons are extremely passive towards dark magic spells, making them easy prey.

By the way, it was possible to "customize" the behavior of each player in the editor - Nikolay, did you do that, I don't remember anymore?