Dwarves versus Orcs.

Well, Goblins have an initiative of 9, so there's a chance that a hero with an initiative of 10 will go first and can hit them with Chaos magic. In general, when it comes to magic, it's better to fully build up a guild and then level up the most suitable schools, otherwise, you might take "Blessing," but if you don't have Divine magic in the guild, it's not a given that you'll find it on the map, and you might not have time to look for it.