I'm not sure if you're asking this seriously as your profile shows you having several jobs at 70 which means by now you should understand the difference between using a class and a job.

But, in case you are, you would be missing a great number of your abilities (check the official job guide and see which of the abilities have the White Mage icon and which the Conjurer icon), traits and stats, significantly hindering any group that would end up playing with you. So no it's definitely not something you should do in a group setting.


To be honest, they should just drop the classes entirely by now since there isn't any actual use for them at any point, really.