Firsttime: Story as you only get to unlock raid content with 2.0 Story.
Else the usual Dr low, Dr Guildhest, Challenge log, Fates, Dungeon spam and ask your FC for the XP boost. Also 3% from Food can help even if its little. Levequests are no use for fighting classes save the allowances for craftinggathering classes as there it is good XP (tho make the 1 to unlock for each area).