Walkthroughs for custom maps.

Strange that your approach worked: Madre has all spells (checked in the editor), would she really allow herself to be blinded and not remove the blindness? As far as I know from experience, the AI always tries to remove blindness. Even when the enemy hero has no healing, no dispel, and no anti-magic, he will definitely cast something (Chain Lightning, Armageddon), as a result of which blindness will be removed.

On the contrary, I regularly observe that the computer is always indifferent to blindness. And it usually casts Chain Lightning or Armageddon if it needs to destroy our clone and has no other attacking magic. By the way, giving the computer all spells means greatly simplifying our lives — it constantly casts all sorts of nonsense (Air Shield in this fight, for example). The most dangerous enemies are those that have nothing but Dispel :)

And haven't you tried to get Berserk? Maybe there is still some way?

I strongly dislike Berserk. I try not to use this spell, like the Cloak of the Undead King with Diplomacy, if I can manage without them. They are very imbalanced and even cheat-like things.

Added after 33 minutes

Anti-Magic is needed to protect against Faerie Dragons in general, both their magic and the reflection of our spells — Liches cannot be blinded (but Forgetfulness can be cast on them).

Anti-Magic is not needed in round 1, since we blind the Faerie Dragons immediately. But later, due to Magic Mirror, a mishap can occur when 7000 Faerie Dragons resist Blindness and hit the Liches with Chain Lightning or Meteor Shower. They reflected Ray of Destruction with very enviable regularity. Vile creatures. I really dislike fights with them, Azure Dragons, Titans, Efreet Sultans, and Wizards.