@WheresMyLuckyCharm,
If you studied FAR just enough to understand the overall concepts, you'll do fine in AUD.
As you probably know already, in AUD they cover very basic J/Es and concepts.
I would take AUD before FAR while the memory is fresh if I were you.
But if you feel more confident about FAR and want to get that out of the way first, then you should.
I gave AUD first only because my nts was expiring and I wasn't ready for FAR yet.
FAR scares me the most.
I'm still waiting for my AUD score, so I'm not in any position to give you good advice.
I hope this helps though.
Good luck and I might see you here often.