I didn't want to give any specific "hints" to the main hero, as everyone has their own preferences in development. So, it's impossible to please everyone. Specifically, I assigned the "Wisdom" and "Air Magic" skills to the main hero; I didn't assign any artillery skills. I don't know where you got that from. It seems that the WoG version is affecting things again.
I didn't give Catherine any skills at all. (it's probably all due to your WoG). I'm now thinking about adding the necessary ones.
There are indeed two Grails, one is with Catherine, and the other needs to be dug up. The Dimension Door is disabled; it can only be obtained with the Grail (I will disable the building option in the cities), I think using the method you know.
Thank you for all your suggestions. I have already made the necessary changes. Good luck.
P.S. How is the testing of your map going?