Some statistics.

I completely agree with the Leader. Statistics are just statistics, and they don't offer much more than that, and they certainly can't tell you about the strength of the castles.
And I can already say which castle is stronger without any calculations. Besides, the color matters – there's a big difference between red and blue Necropolis. And time control is also important.

Here, it's just information about the game world, which castles are most often preferred, and so on.