Initially, I didn't focus on critical hits, but I constantly used bones as a resource. In the end, I finished the week with fewer bones than I started with, but the horses in the castle and the rich secondary resources for gold kept me from getting discouraged.
On day 127, I used a secondary resource to reach the opponent and settled in their main castle. After a couple of days, Clavius appeared. I used a little trickery and then won the final battle.
Thanks for the games!