Quick question about retainer levels

[Valkyrie_Lenneth]

Wait so since it's an AST would I have to change it to a class (like GLD for example) and then switch it to GNB? Or can I go from AST to GNB right away? It's already level 70 right now, but with a job not a class.

I don't think you can go from job to job, but I don't remember 100%. Its been 2 years since I changed mine lol.