However, the demons are a bit behind. They have a difficult start and not very good stats for improving their characteristics (IMHO). If they had a 10-15% chance of increasing their knowledge, I think they would have more supporters. I won't say where the 15-20% should be directed, as that's not a topic for this thread.
IMHO, arguing about which unit from different races is stronger is pointless in any thread. The strength of a race is not determined by a single unit. And it's hard to say who would win in a battle between gargoyles and zombies if the gargoyles had a triple artifact. I think the one who gets a phoenix to help them first will win.