Harmony - Troop Symmetry

I have an idea to slightly modify the skill trees for the creature units (remember that each skill should be a foundation for a creature unit exactly twice, and changes within one race will lead to shifts in other races). In the original game, the dwarves learned "Absolute Protection" through "Chaos Magic," which is strange, as defensive skills would be more logical for protection. They also took "Defense" (which is logical) and "Summoning Magic" (in my opinion, not a suitable choice). Currently, dwarves learn "Absolute Protection" through "Defense" and "Machine Management," but perhaps they should learn it through the "Protective Gift" branch from "Light Magic," replacing the Machine Management branch? Then, the Elves would lose the Light branch, and in return, they would regain the Logistics branch. The Logistics branch would then be moved away from the Demons, but replaced with the Machine Management branch, which has already been moved away from the Dwarves (Demons have a connection to machinery, and their ballista is the most effective because the damage depends on the "attack" and "knowledge" parameters, which grow well together only for the Demon). Added 20 minutes later Another point: for the most part, I use concept art by Olivier Ledroit, created for Heroes 5, as the image of the hero in the center of the wheel. I also use art from Heroes 6/7 if they don't differ too much in style. But here's the problem: the Necromancer concept art for Heroes 5, although it looks great, stands out from what we actually have. Should I use it? I generally like it, but the sword seems completely out of place, which bothers me. http://www.might-and-magic.ru/gallery/album/24-kontcept-art-olive-ledrua-olivier-ledroit/