The most important skill in the first mission to complete the third mission is keen observation!
I think the author underestimated their abilities, and it would have been better to make it so that keen observation is needed in the 12th mission, and it can only be obtained in the 1st mission through a random event from a scholar. In addition, in the 12th mission, we should have a mandatory set of artifacts, each of which can be obtained one by one in the previous missions by randomly finding them on graves/skeletons/chests, etc.
It's encouraging that the other missions don't seem to have similar surprises))
P.S. There's a map-making contest on a Polish website, but so far, nothing that might be of interest.