At the beginning, the distribution seemed pretty good; there were about 90 skeletons in total, plus 2 level 1 creatures. On the second day, I took the Pandora's Box artifact, with the "Defend" enchantment and the "Nomad Horde" skill. There were 40 skeletons left, but it gave me 15 upgraded vampires. After that, it was easy. I destroyed everything I wanted and took two level 7 dwellings and one level 6 dwelling before the end of the week. Plus, I found another artifact with 15 vampires, so by the end of the first week, I had 30 in total. On day 122, I took the Utopia artifact and upgraded it to level 7. Right after that, I encountered my opponent, who was hiding in a castle, and I attacked him there.
Thanks for the game!