Which level 5 monster is the best?

1. I don't understand what you mean by "Minotaurs are almost always killed quickly." I doubt you go into battle and one of your first goals is to attack Minotaurs... 2. Liches and Monks have a normal growth rate of 5th level, so the fact that they are ranged units is irrelevant. Personally, I don't think it would be right to make the growth rate of Fanatics/Liches 10 units...