First, I want to say that I have reworked all the links between descriptions and images for the Knight and Demon Lord. That is, now the descriptions are displayed correctly in the skill wheel when hovering over the skill image. (I have started working on the Necromancer, but this is still in the distant future).
Changes/additions:
Knight
Lord of Cold ---> Deadly Cold ---> Lord of Chaos (advanced spell)
Intelligence ---> Graduate ---> Wizard's Mark
Battle Frenzy ---> Critical Strike ---> Cursed Mark
Demon
Battle Frenzy ---> Critical Strike ---> Cursed Mark
Lord of Pain ---> Cursed Land ---> Debilitating Strike
Exploding Corpses have been moved to class perks
Fire Corpses --->
Debilitating Strike --->
Cursed Mark --->
Sudden Attack ---> Urgash's Call
Mage
Lord of Cold ---> Deadly Cold ---> Lord of Chaos (advanced spell)
Intelligence --->
Wizard's Mark ---> Graduate
Control Machines (does not require the Wizard's Sign)
Exorcism (does not require the Wizard's Sign)
Banishment (does not require the Magic Mirror)
Counterspell (does not require the Magic Mirror)
Warlock
Lord of Chaos is available immediately upon learning the Basics of Chaos Magic
Ultima (central perk) through Lord of Chaos instead of Lord of Lightning
07/26/2020
Demon
Eagle Eye ---> Endurance
Graduate ---> Wizard's Mark
Triple Ballista ---> Enchanted Machines
Blessing ---> Prayer
Hunter ---> Machine Devotion
Aura of Speed ---> Inspiration
Barbarian Girl ---> Dwarf Girl
Trophies ---> Elf Girl
Freezing Cold ---> Lord of Chaos
Lord of Charms and Lord of Earth ---> Enchanted Armor
Mysticism ---> Army Protection from Chaos Magic
Diplomacy and Troop Gathering ---> Empathy
Secret Knowledge ---> Counterspell
Lord of Charms ---> Enchanted Weapon
Lord of Charms and Lord of Life ---> Spiritual Bond
Ranger
Lord of Charms ---> Enchanted Weapon
Knight
Lord of Charms ---> Enchanted Weapon
Lord of Charms and Lord of Life ---> Spiritual Bond
Necromancer
Lord of Charms and Lord of Life ---> Spiritual Bond
Banishment is no longer required for the Scream of Terror
07/29/2020
Knight
Added Stunning Strike to the attack branch.
Added Wild Fury to the attack branch.
Necromancer
Banishment is required for Habitable Mines (the leadership branch is not required).
Added Exorcism
Added Enchanted Armor (through Lord of Earth and Lord of Charms)
Plain text is difficult to perceive, and it is not necessary. It is better to go into the game and make 3 screenshots for you:

