You can get 6 AAs per MM at 85 depending on how many AAs you already have, My Bst has in the 300 range, he gets 6-7 AAs per mission, My necro is in the 800 range, he gets 3-4 AAs per mission, My Shammy has close to 1200 AAs and only gets 2-3 AAs per mission. I'm not sure exactly where the change in amount of AAs happens but would venture a guess that it's where the AA XP changes normally, around 500? then 1000? not sure about that either. But I'm sure someone out there does.
So, anyhow, I put 18-21 AAs a day on my Bst doing all three MMs. I'm happy with that as I'm not finding the time to be on like I used to. I taskadded a few guildies who received 10 AAs at lvl 78ish I think it was.