Daily Roulettes. Deep dungeons. I hear leves are good I think. Food check. Join a FC with EXP buffs.
That MSQ daily exp go burr.
There's more, I just can't think of all the ways to gain exp because it's been a while since I've needed to tbh.
But there's way more options than fates and queues as a dps.

I agree with Dr. Who up there. This game tosses exp at you that folks be like 10+ leveles ahead their quests most of the time because of that. It in fact encourages you to switch jobs really to stay "at level" with your MSQ.