Luck wasn't on my side, although, in all fairness, it was my own fault.
We actually started a different map with different towns - my Castle vs his Dungeon. It generated complete trash: 0 treasure zones, 0 conservatories, 0 convenient passages. I built up somehow, and by the middle of week 2, despite the rough terrain, I was ready to break into the center, but the internet died at the worst possible moment - when I was clearing the pile of Eyes.
They wouldn't allow me to reload my save, didn't believe the screenshots, and decided to restart - which is not surprising, because while I didn't have anything particularly great, my opponent had it even worse, and I was supposed to win.
In the second game, everything was going well, except for the GO against my opponent - Faerie Dragons; I couldn't clear them at the very start of month 3, so I retreated to the treasure zone. I gathered 50 Wyverns, 50 cap. Minotaurs, 5 Angels, 60+ h. Harpies, had Medusas, a hundred Troglodytes, Eyes. Meanwhile, my opponent had - 1 Angel, 70 Trogs, and 5 Scorpicores.
But you can't fight against 4 DDs on balance even without logistics...