The main goal of my comments is to improve YOUR guide, but if they are of no use, I will stop writing.

Why be so categorical? The guide already contains a lot of information about city walls - see section 1.23 "City fortifications and their siege." So, there is no need to simply repost everything from your computer... Approach the work creatively, choose and add what is not in the guide at all, and try not to duplicate information.

The note about the interaction between the Prayer and Slow spells is valuable. Thank you. I will test it and add it to the appropriate section when I have the opportunity...

Regarding the specialization of heroes - I am working on this section. It will definitely appear someday. :)