Which castle can be considered the best?

Which castle can be considered more effective against the others, and why?

Conflux and Necropolis are considered overpowered.
Necropolis is strong due to the many bonuses its creatures have. Although their health and attack stats are among the lowest, they compensate with numbers. Necromancers, with their necromancy skill, can revive skeletons, and if used correctly, you can end up with 2-3 thousand skeletons. This large number can defeat anyone, and the necromancer can quietly raise new skeletons after the battle.
I haven't played much with Conflux. In my opinion, it's the same principle as with Necropolis: large numbers of creatures. Plus, you have two archers at the beginning. The upgraded water and air elementals are very effective. I remember collecting 19 of them and defeating all neutral creatures up to level 6. My army also included upgraded water and air elementals.
But this is just my opinion. Maybe they aren't that overpowered for some.))))