I go experience.
If you do "collections", which are very easy in Tainted Karana and other zones where they started, then many of those reward you with 12 AA for each one completed. You can even buy individual items dirt cheap (1 plat) in the baz if you don't want to go hunting around.
If your paying for EQ monthly then switch to Auto Grant and it will award you most of the AA per level every 5 levels or so. If your not paying, then try to pay one for a month, then the next month switch to another account and pay it and Auto Grant and keep rotating around so all your guys get most of the AA free. The Auto Grant does not work on free accounts. But whatever AA you were given while running it during your paid time you will get to keep when you go back to free.
At 85 start doing Overseer. You can earn experience and collection items thru this. At first the experience is not that much but it soon will be nice and it runs in the background. All you have to do is set it up each day. 24 hour quests give the most exp.
And at your levels you are right where you need to be expansion wise. NOS would be a waste of money right now.