Elite skills are special types of skills that can be acquired during the game. They are available in addition to the skills of the primary and secondary classes. The elite skills that can be learned depend on the combination of the primary and secondary classes.
You have the choice of doing either the Old System or the New System.
The Old System is slower and takes more work, but after the 50 Elite Skill, you will be able to create Moa Weapons. Also the Old System is only available for the Human and Elf races.
The New System is faster and can be done by any race. But you won't be able to create Moa Weapons.
As soon as you reach level 15 with your main and subclass, you can start the prossess of getting an Elite Skill. After that you can gain a new skill every 5 level up to level 50. Your main and subclass always have to be the same level or higher for that. This means your classes need to be 15/15, 20/20, 25/25, 30/30, etc. After level 50, you only can gain 2 more skills - level 60 and 70.
Note: The skills "Shield Form" and "Disassembly Mode" are not provided by Elite Skill NPCs. They can be obtained by completing all quests in Yrvandis Hollows and then speaking with the NPC Logden Darkstove in Morfantas. You must have Champion as your primary class.