I'd say focus on getting that one level 60 geared up. Try to hit your lore cap each week, at the very least get it geared in esoterics or high level dungeon/raid gear (I forget, do the new dungeons drop higher ilvl than esoterics? And is Midas still weekly capped?)

Once you've got your main quickly geared and unlock all the content, then I'd say to level up other jobs. Preferably aim for having a healer, tank, and DPS all at 60 and geared up like that.