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My walkthrough on the hero level.
Russian version 1.1
Immediately, I rushed with two heroes upwards. From above, along the way, the first hero ran towards me (I defeated him along the way), and a slightly stronger one was to the left (I defeated him while staying in the upper Castle). Next, I went to capture the empty Castle on the left. Another one ran in from the upper teleport – I defeated him. The demons came for a visit :) ... then a hero ran in from the left teleport, and... I defeated him, but with significant losses. Here, I tried replaying the level several times, and eventually, I returned to the original approach and decided to do the following. I ignored the hero, the one I was defeating with significant losses, as well as the two Castles that I had acquired with great effort, and went to the upper teleport. After exiting the teleport, I decided to simply scout the map and sent my main hero upwards, and the second one to the left. Two Castles were encountered – I captured them (I think it was good that I sent my main hero upwards – the Castle there was strong, and I gathered an army). The hero, whom I was defeating with significant losses, followed behind, and when he exited the teleport, he always followed the second hero (perhaps because he was closer). Therefore, I had to have my strengthened main hero meet him. And then, miraculously, that enemy changed his mind about going to the weak hero and rushed to meet the main hero, and paid the price for it. Here, I decided to check the tavern and see who was now the strongest, and what I saw filled me with delight – they were selling defeated enemies there, and when another week passed, the enemies started putting themselves up for sale again and again. In general, all the difficulties of this map ended here – no one chased me anymore. Going counterclockwise around the map, I captured the remaining three Castles, and then reclaimed everything I had acquired with great effort at the beginning of the game. Yes, I almost forgot, the demons came for another visit :) Well, that's all!!!