based on personal experience on Jebel: for Dungeon, 3 exits to the center on day 121, i.e., a folder with a book (not necessarily the starting one) and experience for magic at the end of day 117, I waited for reinforcements, and this was only thanks to the starting troops, which are quite quickly converted into a Warlock. Please show me a Castle with similar strength.
Castle, Conflux... these Castles also break a lot of things in the first week.