In the first week, I upgraded 2 external stacks of Liches and built Cavalry in the citadel. I also captured a Tower. In the second week, I took a Castle, and there on the grass I took a max-level Griffin Conservatory with 150 Skeletons, 6 Wights, and 5 Cavalry without Mass Haste. Then I carelessly took a level-3 Griffin Conservatory but lost the remaining Skeletons. A day later, another level-3 Griffin Conservatory. In the third week, with 10 Angels I arrived at the treasure zone, where I picked up two more Angels and earned 15 experience fighting Diamond Golems. However, my opponent had no luck.
Thanks for the game!