Walkthroughs for custom maps.

On the contrary, I regularly observe that the AI doesn't care about blindness.

Well, I don't know... maybe we have different "Heroes": :) in my game, the AI is very cunning and almost always senses trouble when I blind it. But I checked and confirm: all dragons are blinded, starting with the mythical ones, but I didn't regroup my troops, and one attack took out about 50,000 liches, while raising undead restores only 123 liches at a time. If these were living archers and I had a pack of archangels, their clones could quickly revive them all, but that's not the case here.
Checked: There are only 2 castles on the map, and the portal of glory hasn't been built in one of them yet, so there's no hope for archangels.
And I also didn't see the "Executioner" spell in the spellbook, so I still don't like it. After all, no matter how good you are as a player, the factor of luck/bad luck also sometimes plays a significant role.