There were no Mages. I fed the Miner chests until it reached level 6, and on the secondary hero, I freed Andra level 5 with good combat skills and a lot of mana. On turn 131, forgetting to pass on the growth, I spent all the resources accumulated over the past two weeks, except for the demons, on 60 Wampyri, for boots, a sword, and 35 Centaurs in a box. The trade and 4 Greater Mana Potions happened when the opponent was already at my castle, and the chain spell worked properly.
Thank you for the game.
