Started playing without rests, a very good start, Crag Hack + Müllich + Nagash, there's a chest with 5k experience, there are several Dwarven Treasuries, a Griffin Conservatory is found on the first try!

That made me relax a bit, then I lost an Angel to 84 upgraded Harpies, sad... A very tough second week... The computer is incredibly oppressive, constantly ambushing or killing my heroes, keeping a defensive garrison in the castle and so on, only by the start of the third week did I manage to wipe it off the face of the earth, and another computer died there as well.

At home there was an external dwelling of Medusas — I Portaled them. By week 3 I have 40 Medusas and 120 Troglodytes, plus some chaff from the Dungeon, the situation is mediocre, I dive into the Conservatory without checking — it's a tier-three one, with Mass Haste I take it very easily (Crag Hack rules), then I head to the treasure zone, where I pick up Boots of Speed + 4 Dragon Fly Hives giving 24 Wyverns, things are looking up.

Well, week 4 became the redemption for all my previous mistakes.
After breaking into the computer's territory (it was a Necromancer), I went into another treasure zone, there were 4 Hives (50 Wyverns), two Dragon Utopias (small ones), useful loot was +9 to all stats, then I cleared out the previous treasure zone (I had left a Utopia there, afraid to fight it with three Angels and 24 Swarms), it gives me the Angelic Alliance and the Helm of Heavenly Enlightenment.
Town Portal to the new treasure zone (the secondary hero there had already been killed earlier), claiming two artifacts — +15% and +10% resistance mantle. In short, from the start of week 4 until day 212, I generated 1500 skeletons from scratch (out of which about 400 were converted).

On day 212, Kyrre shows up in a treasure zone, I reach it in two Dimension Doors, his stats are even slightly higher and he has 19 Angels, but against Mass Haste with 60+ Monks and 60 Medusas with Expert Archery and a Bow, only half of the Angels survive to their turn, the opponent surrenders after losing 11 Angels, 10 Swarms, and 50 Grands (Grand Elves or similar), and surrenders the following turn.

Thanks for the game!

There was also this moment, maybe it will help someone. (I remember in some game a Jurist also had a tactic that didn't work, and autosaves were loaded too)
In the hero window on the right side, where the battle formations are, there's a Tactics button, which is active only if you have the Tactics skill and can be manually turned off (i.e., disable Tactics entirely), I have no idea why this button exists and never knew about its existence (I still don't understand how I turned it off), but when Crag Hack died during a fight, Tactics didn't work — I was sure it was a bug, fortunately the opponent first explained why Tactics didn't work (it was genuinely a shock for me), and then forgave me.