How should I develop my units to defeat a Knight?

Honestly, mish-gun, I trained 103 units of Isabella against 92 units of Banshees, but Axel really impressed me with his diplomacy. He gathered half the map. I don't know if you played that well, but as a result, the armies became almost equal. I guess that was the reason for the upset, and he also found a scroll of antimagic. I don't know what to do with it yet. Still, the surface is much better than the Dungeon, and the artifacts are better there. True, I was playing two versus two. I also trained Retribution and Fallen Knight, which is also not bad (for the Knight).
P.S. Send me the map again - LORDdeSat@yandex.ru

Within the agreed time, I gather at least 120 units of cavalry, whether on the surface or in the Dungeon. I don't use diplomacy at all; I consider it cheating - the people who play with me on this forum won't let me lie! I always manage to clear the entire map, both on the surface and in the Dungeon; it's just easier to do on the surface! The only advantage of playing on the surface is the double damage against Merfolk! Artifacts in this map are generated randomly, both on the surface and in the Dungeon!
The key to defeating the Necropolis is Antimagic (I already wrote about this; it's like Subdue for the Necropolis), and I won't tell you about the full build-up - it's intellectual property. I'll just say that it's special against the Necropolis!

If you still don't believe me, let's play again, same conditions - I'll be in the Dungeon!