I don't quite remember how I completed "The Price of Loyalty" honestly. But I think I completed it like other maps on the site. I always play as the hero.
What I do remember is "Blind Faith". It was really tough! But I managed to complete it thanks to my gaming strategy and combat tactics in the city. Plus, a bit of luck.
AstralLein, I asked you for advice on how to proceed: should I rush forward or wait in the castle, which skills should I develop, etc.?
For example, here's one option: take Kaspar, develop him to the maximum, and hide the main hero. Then, engage in battle in the city.