Quote Originally Posted by sakuramochii View Post
i have Conjurer to lvl 38! i read somewhere you also had to get Arcanist to lvl 15 to unlock the whm quest line but that was the last thing i had to try and it didnt work
All the class upgrades for the base jobs (Soul stones) are at level 30.

Originally in ARR you needed Class A at level 30, and subclass B at 15 to unlock a single class.