By the end of the second week, I broke through the underground via rough terrain to the surface towards the green player's castle and captured his town. From there, I went through a teleport to the treasure zone on the dirt terrain, accumulated a decent number of skeletons, took a level-3 Griffin Conservatory, a couple of Dragon Fly Hives for 12 Wyverns. I found a level-3 Dragon Utopia, which gave good stat boosts (Sword of Justice, Necklace +3 all, Shield +5), I defeated a creature stack for Zealots' Bracers, took several chests for experience. Then I took another Dragon Utopia, which gave a Helm of the Fifth Level.
My opponent gifted me a well-leveled Grindan, whom I lost somewhere due to a misclick. I then found him in my Tavern, and he helped me a lot in collecting the home Griffin Conservatories.
I built a level-4 Mage Guild — easy Town Portal. Then, with full control, I started quickly capturing my opponent's towns. Having both scouting abilities, it was easy to track his movements. In the end, I caught Mülluh with Shackles of War in the underground, having a huge army and much higher stats.
Thanks for the game!