DarkT1me,
You should ask the author about the meaning. For now, the map is only available on that Polish website. I would really like to ask the author many questions about "Zemsta Mutare," but the need to register there and write in Polish is discouraging, and most importantly, I anticipate (with a probability of about 90%) that the author simply won't answer.
90% of the map can be completed without any difficulties; the remaining 10% consists of interesting battles in antimagic garrisons, initially with a garrison of 9999 creatures of each type: Azure Dragons, Archangels, Archdevils, Titans, Chaos Hydras, Naga Queens, Champions.
At first, I thought that they didn't need to be defeated, and they couldn't be defeated, but they can be defeated, of course, only by someone from the armor-wearing units; in my case, it was Tazar. He was the one who did it.
The second condition for defeating this garrison is farming skeletons. By 7-2-1, I had about 185,000 of them (Vidomina and Isra). But if I had started leveling them up a little earlier, right from the beginning of the game, I think there would have been more than 200,000.
I decided not to fight the final boss - the Dragon with an army: Azure Dragons (9999), Titans (9999x4 stacks), Naga Queens (9999x2 stacks) because it would be difficult to defeat him with the forces I have (UPD - HE CAN'T BE DEFEATED AT ALL :). And waiting for reinforcements is boring. Therefore, I captured all the castles, and the Dragon died on his own.
Ask questions if you have any :)
7-4-1 is not about speed; I was leveling up 10 heroes at the same time (all logistics, 2 necromancers, Tazar, Mulich, etc.) because I didn't know who would be more useful, although from experience, I knew that Tazar carries almost all battles on XL author maps. And, yes, there was also a mistake in the skills: I couldn't get "attack" for Tazar, which would have made the walkthrough much easier, but the last skill that appeared was air (useless in the antimagic garrison :).
P.S. It is probably possible to kill the dragon, perhaps by trapping him in a castle or during a castle defense. To do this, you can free him; he will capture the nearest dungeon (you need to prevent him from doubling his mana). Judging by the prospector, he only gets the initial prayer for the Angel Alliance and has speed from spells. Accordingly, if you sit in a castle behind a force field with Azure Dragons + Archangels + 1,400 Titans, you can destroy the ballista, give berserk, and the Azure Dragons will kill all the Titans. It is better to sit in the castle while the Dragon doesn't know anything other than prayer and speed from spells. In general, there are options for killing him, but I don't have time to test them all :)