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Well, for starters, the topic of a mentor often comes up, but you can't find one on every map. In that case, the option of changing a perk doesn't work. And developing defense for an Orc isn't the best option (because there's also mechanics, logistics, leadership, luck, education, if you're lucky... there's just not enough space), although it's not bad. So, it turns out that the development you described is quite possible and actually logical, but not always achievable. But still, in my opinion, the happiness of Orcs doesn't lie in the fury of the horde. I much prefer the war cry. If you combine it with the education perk, which you don't like, it's scary to imagine what the damage will be, because an attack of 25-30 with education is common, and here there's also an additional bonus of about 10, and the speed increases. Add sharp mind, and the enemies won't be able to avoid the fury of cyclops, executioners, orcish warriors, and centaurs.
P.S. When there's only one unit left in the fight against a dark mage, he usually starts receiving curse spells one after another, so the accumulated fury might not help :) It all depends on the number of creatures in the unit and the number of creatures on the other side.