Power Buildings

yes, Harpies need a Stronghold, and Nomads need a Caravan. I build them differently each time, depending on what I want. Harpies are good, but they die quickly, and their damage isn't impressive. Nomads seem more useful to me; they block archers, and their first strike is great. Ogres are good on the third level; there are many of them, they are tough, divided into several stacks, and they buff well, but their slowness is a drawback. You can't run around much when attacking a castle. Cyclops are excellent overall. I prefer the birds from the 4th level; they are more fun, but I build them based on what I need. Hippogryphs deal with creatures like Chaos Devils very well... with a Pit of the Dead and nobility... hmm... in that case, the value of Hippogryphs will probably be higher.