Iris

The text raises more questions than it offers concrete advice. For example: who will be the opponent? (perhaps they are playing as a Necromancer, or as the Sword Coast faction). What does "late game" mean? (3 months, 6, 9?). How many castles are there? (this is not only about growth, but also about the probability of getting "vampirism"). Let's just say that with only one castle, Iris is not a viable option. Training troops in the castle will bring her minimal benefit compared to all other heroes of the Order faction. Regarding the hero's development: for Iris with "vampirism," leadership should be the last priority. The main combat stack won't be moving around frequently. Here, you either choose "light" leadership or "dark" and, for example, "education." Similarly, two schools of magic are too much for her. I would take attack with bonus instead of one of them, and the remaining perks in this branch will be derived from the chosen magical school. "Readiness" is a good choice when playing against the computer, but not very useful against a human player. Finally, choosing a main hero is not only about selecting the strongest for the final battle, but also about which one is more convenient for clearing the entire map. Myv is like a scalpel; with good skill, she is effective, otherwise, there will be nothing but disappointments.