Auto-translated
You could say I completed the game using a specific hero. The map is excellent, and I thank the author for it.
Now, some details and observations about the playthrough:
1. First, I leveled up Kaspar to level 20 so I could always return to his dwelling. Arantir stood by the cliff and was left untouched. I leveled him up later, at the top. Then, a blue knight appeared and started harassing Giovanni. He kept harassing him until he died himself. This was beneficial to me in two ways. Was this strategy unexpected for the author? Because it makes the game significantly easier.
2. Regarding the scripts. It's clear that any player can perform the exchange. The script involving three necromancers is only for Arantir, as there is a warning about this. However, only Arantir transforms cities. But I took a human city with Kaspar and used it for a long time to gather resources for conversion, which was advantageous to me. And finally, the portal script. I completed it again with Kaspar; they took everything I had, but they didn't close the portal. They only closed it when Arantir arrived, but he was quickly defeated. The game isn't worth it because Kaspar can easily close it by sacrificing himself, and Giovanni doesn't emerge.
3. Arantir accepted the final battle in a rebuilt knight's castle, and it ended with him easily defeating the enemy (killing the catapult + dispersion + berserk + raise dead). A new day arrived, and a message appeared, something like "Leave the old man alone." The OK button responds, but the message doesn't close. So, technically, I didn't finish the game.