Quote Originally Posted by Niwashi View Post
If you haven't yet, you should also get Gladiator up to level 15. Once you complete your level 30 MRD quest and have GLD up to at least level 15, you can get your Warrior Job quest. (Pick it up at the MRD guild hall in Limsa.) That's what will give you your WAR Soul Crystal.
Better yet, take Gladiator to 22 for Provoke.