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I disagree with that. Minotaurs, especially in the late game, almost always act as observers in battle. First, all the high-initiative creatures are eliminated, and then a horde of enemies attacks the minotaurs. We shouldn't forget that the effectiveness of Chaos decreases noticeably in the late game, and it's completely useless against Orcs. And if the opponent is a Dark Mage, then it will be "hello" to your own troops from the minotaurs.
In the late game, the Warlock doesn't have many chances, whether it's against Synitar, or against Irana with Furies, or against Kifrah. Kifrah just lasts twice as long as the others. The poor minotaurs will be swarmed by enemies, but nevertheless, the Warlock himself will deal more damage than other Warlocks.
Still, I don't see the point in the late game (except against Orcs) for the Warlock to develop anything other than Chaos; otherwise, there's no point in elements or spell enhancement, and what then makes the Warlock better than another mage hero? With good spellcasting, elements, a lucky Sorcerer, and if you're lucky with the Creature Ability, the Warlock can deal 10,000 or more damage, freeze enemies, and halving their defense is also important.
P.S. Once, I played as Irana against Wing in the late game. I got lucky, and 300 Furies joined me, and I also had Dark Magic. I didn't even have time to use it; the battle ended in the first round. Dragons, Dancers, Fairies, Archers, Druids, and Unicorns, with assistance, eliminated my Furies and Lizards before they even had a chance to move. The Furies moved after the Dragons, Dancers, and Fairies; there were so few of them left that it was pointless! If I had taken Kifrah and Chaos, I would have lasted at least a little longer, and it wouldn't have been so embarrassing.