A terribly long game turned out — largely due to a bugged generation where my exit from the starting respawn branches into my Inferno computer opponent and a passage to the opponent. From my respawn, the entrance to the computer's respawn is through roadless terrain, and from the computer's respawn, the exit goes through 2 non-working two-way portals and the best part — a one-way portal with a one-way ticket (a stone bag of 5 tiles in the underground zone, with no way out).

In week 1, I captured my computer opponent, not much money, developed somehow, guards everywhere were fierce.
I found a conservatory on my respawn and on the computer's, only 4 Dragon Fly Hives. Seems decent, but no buildings.
In the third week, on the road where I thought to run, Galtran appears with stats 7 8 6 6 (8 angels, 700 skeletons, 30+ Wyverns, 100+ halberdiers, marksmen)
It gets scary because there's nothing to fight him with. Right then it turns out that the teleports don't work and there's no retreat path.
I gather all the Dragon Fly Hives and conservatories, meanwhile building a mage guild in the computer's Inferno. I recover a Town Portal scroll!
At level 5, they give Fly. Galtran seems to be without Logistics, so on the middle roads I managed to stretch until the end of the week, boost Grindan's spell power, combined with Intelligence it turned out fairly decent for the encounter. Also I cut 70 demons.
Grindan 2 4 7 (200) Meteor, Blind, 7 angels, 70 demons, 30+ Wyverns, 10 gr. pit fiends. Built a castle and holed up in it.
Galtran turned back. Behind the lines, a scout hero on an angel was breaking Galtran's supply chains.

Managed to fight him off. But the situation is still bad — Grindan has no Logistics, and everything is somehow far away. Kalkha has Logistics, but Wisdom and Earth are only basic and there's nowhere to level.

I found 2 utopias, which gave a Sentinel's Shield, a +13 sword, and КО under Fire for Grindan.
Galtran ran off into the treasure zone, while I maxed out Kalkha's Wisdom and Earth, leveled a couple more heroes, and on Fly captured the computer's Fortress and a couple of villages, also recaptured the enemy Necropolis stronghold and placed a Vail.
Built a mage guild in the Tower village, there's magic mirror from Inferno. No Dimension Door.

But then Galtran starts jumping and repeats his path to the Inferno castle.
I again holed up with Grindan in the castle with 300 mana, equipped manacles, and there's a cloak of denial and anti-chain mail.
Grindan 19 17 20 (300)
14 angels, 54 monarchs, 4+4 sultans, 10 dragonflies, 200 demons, 20 pit lords
Galtran 18 18 19 (170)
23 archangels, 270 halberdiers, 37 crusaders, 23 zealots, 40+ marksmen, 46 Wyverns, 1100+ skeletons.

In the second round, I destroyed the ballista and through Blind, Slow, Haste left the opponent without mana, then fired off ice bolts.

Thanks for the game!