The trick with the fact that magic doesn't affect Black Dragons is not always good, because sometimes you can sacrifice someone (and you can sacrifice a lot of people, for example, archers who are not very powerful...).
or even better, clone the dragons...
I like Minotaurs the most; they are very useful for a hero with diplomacy...
while you're walking around the map, you'll gather a bunch of various neutral creatures into an army, but what about morale? It is in these cases that Minotaurs will save the day...
