Spent all restarts, opponent one, and it got interesting.
The starting hand pleased with 2 bows from the archer stacks, but the secondary hero's army was killed by a mine, so I had to break through the Gogs for the mine, of which there were more. Therefore, I postponed the march on the secondary hero, deciding to clear the respawn first and take both archer stacks. The respawn turned out to be very small, I gathered everything quickly, and ran with Adelaide to attack the Gogs (I made her the main, there was no one better).
The Gogs were cleared fine, -3 Arbalesters, with 30 remaining. On the secondary hero, a gold mine behind Liches, another behind Djinns, an artifact +2 Attack behind Monks, a portal behind Greater Golems, and I found a path behind Snipers along the road, or behind Dwarves off-road. On day 115, I took the mine behind the Djinns, finances improved; on day 117, the 1-4 dwellings at home had a Fort.
Day 121 - I bring the Archers and a few Pikemen, attack the Golems for the portal; from the other side, Greater Dogs and a Necropolis village. I decide to postpone, capture +2 Attack, lose 10 Archers - there's a Ghost Steed. I run to attack the Dwarves.
Day 122 - Behind the Dwarves, 20+ Demons guard a quest artifact. There are 40+ of them, but with many Arbalesters, they are cleared fine.
Day 123 - I bring the artifact to a hut, 15,000 experience. I move my main there via Town Portal.
Day 124-125 - I turn in the quest with Adelaide, she has Expert Water Magic, Expert Air Magic, Wisdom, Intelligence, has Tactics and Earth Magic. Good stats, good income, decent army and magic, I'm about to make contact. But the opponent surrenders.

Thanks for the game.