The most challenging maps for you.

Here's the red hero in the Dungeon at 6 o'clock, heading towards my Castle. Here he is, having captured the Castle and heading back to his own. I haven't finished off the Dungeon AI yet; the one near the red tent took 3 Castles from him, but I couldn't find the last one. And I found a place where you can get a Grail for level 32. But it wasn't relevant because I already had the Book of Earth.
P.S.: Can you recommend another map in a similar style?