Specially for readme I will repeat, to eliminate any speculation about my ideas

1. Force assessment: parameters slight advantage for Nella, battle magic was present, I was losing in power, thought it was insignificant, since I would have won a turn earlier. If necessary, an exchange or buyout + shackles were available, a chance to intercept.

2. I jump over the cliffs into Inferno territory. I see an entrance to the underground and a road to the secondary Inferno hero. According to the template, there's a treasure zone in the underground - I go down and see no one.

3. The road led to the secondary hero, and the roadside objects were probably cleared + in case of failure, a trap, I decide to go up so they can't reach me, and then depending on the opponent's movements choose the next route. An unclaimed Dragon Utopia luckily appears, turned out to be a level 2. If I had headed down, I would have also found a Dragon Utopia, of which there were 5 in this treasure zone.

Britva, on which turn did Valenok spot the treasury? Besides, not all of it was there. Furthermore, you had an Imp familiar for 1200 if I'm not mistaken, and you DID NOT KNOW about Valenok having the Sphere/Cloak, therefore the exchange could have been conducted quite favorably - minus 6 Angels minimum per round with such a familiar, so there was nothing to fear, either go forward for an exchange, kill the Angels (they were Valenok's only strong striking stack at that moment), or go to the pink computer, or go west into the swamp for two Dragon Fly Hives. THAT'S IT.
But you jumped into the corner, which means you loaded the save and found out that the opponent had a level 3 Cloak... otherwise you wouldn't have chickened out of going for an exchange... and with the Cloak, sorry, Nella crushes Gurney into nothing, the exchange would have been completely unfavorable for you....
You could come up with better excuses in 2 months... but you couldn't even manage that... you won't convince me.