Class & Skill

Tier 1 : Basic Performance {Level : 0}

Tier 2 : Custom Performance as your decide that you have to go to learn form Class masters {Level : 41}

Tier 3 : Better Performance learn with Class masters + Join the Faction to be the Knight of Queen {Level : 95}

Tier 4 : To learn from The Four Horsemen, There are 3 kinds you have to choose {Level : ???}  Four Horsemen's classes Tier 5-7, You have to learn from the performance owner only.
 * More Better Performance
 * Change the momentum of performance [like change defensive to offensive] (Some classes doesn't have)
 * Learn about The Four Horsemen's unique performance. (that turned you to a merchant for some classes.)

-Tier 4 for Healer, Go to learn from The Father of Pope.

Tier 5 : Hidden NPC that you need to find by your own or ask other, if they know.

Tier 6 : Will making you to choice 2 ways of true power of classes, Some class doesn't have.

Tier 7 : Consider as classes that filled with Final attack skills.