Necropolis or Castle (Which one is stronger?)

it all depends on the player's skill and the situation. However, objectively speaking, one can conclude that the Castle faction is stronger. Take, for example, Lions with a water expert and the Prayer spell cast on all units, or Sir Mullich. But this depends on luck and the map. I agree that Lich and Dread Knights are probably stronger than their counterparts from the Castle faction at the same level, but the difference between archers and dragons is quite significant. In this case, as in most cases, it's best to judge based on the situation. And in the second game, the Necropolis faction is definitely much stronger.