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Well, I personally managed to beat it using runes and summoning spells somewhere in the middle of the 3rd month. And it was outside the castle. It seems similar, but only through runes and Light magic. Remix defeated it without significant losses; that battle also featured an older version of the map, and she had a specialization in "Divine Retribution" after each cast of Light magic, but she didn't have Chaos resistance. Other people also managed to beat it, but they didn't write exactly how. For example, Sandro_S. However, Remix and I both had quite large armies. I had a good number of all units except for Tanners and Warriors.
No. Jessica buys an army from two castles and a couple of dwellings. I didn't understand where she got so many horses until Remix explained it. She trains them.
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Thanks for the replays. I'll gladly watch them.
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By the way, how is your progress in Godric's Hollow?