I just got Black Mage to 60 and holy crap I never had a more annoying time trying to do anything in a game before. It's like they design a job where you have to remain still and have the right timing to keep being able to use fire IV but design the bosses where you have to be constantly moving and become untargetable.
So for everyone that knows how to put up with it and do it correctly you have more patience than me and are way beter than I am.