Astrologian is a pretty weird name for a fortuneteller.
Sage is easy to remember, but doesn't tell you anything about their role, weapon, or even class flavor. Medic would have been better, but they wanted to use a "classic FF" job name even if it has zero in common.
I would have picked Painter over Artist, to be more specific about what kind of art, but Pictomancer is fine since it's what the class was called before. It's a mage class. It can't use the same rules as physical ranged Dancer/Bard.
