We are offering players a chance to exchange their level 75 subclass skill certificate for another one of their choice. Players must have a level 75 or higher subclass in order to participate in this event. The Subclass Certification Helper who can help you with this exchange is located on the second floor of Ivory Tower, next to Avant-Garde.
Isn't that a bit wrong as classes are not equal in how easy they are to level?
it's not what you think it is .... Subclass Skill Certificates are used when you go get the new subclass dependent skills in your main class ... this is NOT a oh you have a mage sub? oh ok go talk to that npc there and swap out your mage sub for a cardinal sub :)