Post 60 I've had some success with PVP frontlines and the occasional dungeon as DPS, PVP frontlines being the bulk of my XP.

Even if you don't normally pvp in games I would encourage you to try Frontlines, in Stormblood SE has done a mostly great job of balancing pvp and making it fun. Your name is also not visible to the other teams, you'll be tagged by your job name.