Trying to beat Zemsta mutare. 95% of the map is very easy, but at the end of the map there is the problem of breaking through the anti-magic of 2 garrisons of 3333x7 each and 1 garrison of 9999x7. The first two can be breached with losses, but the third one is impossible. How to complete this map, or is there a bug to get through such garrisons without losses? The Armor of the Damned and Cloak of the Undead King cannot be assembled, only the Angelic Alliance is available, but it's of little use when stats are already 99.

I wrote earlier on the forum that for these garrisons, you need to level and use only an armor specialist: Tazar (better) or Mephala. Tazar must also have tactics and offense (this is a must-have in an anti-magic garrison).
You can only break through the 9999 garrison with skeletons farmed throughout the entire map (I had about 180k of them, but more is possible). Skeletons on prayer can break through, especially using the terrain. Also take a bone dragon and an arch devil into the garrison to give the garrison -2 morale, which will also help a lot.
I don't know any other way to break through the 9999 garrison; gathering forces for 12-20 months or more is a bad option.
Oh yes, I forgot to add that in the 9999 garrison there is an "external dwelling" where you can hide a strike stack so that only 1-2 enemy stacks hit it, no more, which will save losses.