In the old system. leveling from 50 to 51 = the same experience it took to get 1 AA. But it doesn't work that way now, and trying to equate 1AA to actual level experience doesn't really seem possible without alot of testing, especially with the bonus for low AA.
And level experience varies for each level. I'm not sure how it scales, but it's exponential for sure. Like as an example, but I don't think it's this steep in EQ, let's say it takes 100 xp pts to get from 1st level to 2nd, and 200 for 2nd to 3rd, and 400 for 3rd to 4th, and 800 from 4th to 5th, and so on. My guess is it's more like, 100, then 150, then, 225, etc. The level exp has been modified several times in the past, and I don't think any one has parsed the scaling as it is now, but there are some old, yet accurate parses of xp for the low levels in the original game levelinng system.
Also, it depends on how much xp you put into AA. Press V to bring up the AA window, and at 51 or higher you can adjust the amount of xp that goes toward AA. If you go 50/50, it'll vary by mob, and how many AA you have. With the new variables it's hard to give an estimate.
Only steadfast rule, is if you set your xp to 0% to AA (100% to regular), which is what it will be by default, you will get no AAs what so ever, and only regular leveling xp. If you keep it like this you will just keep leveling without getting any AAs. So you'll have 0 AAs, at 52, at 53, etc.
If you set your xp to 100% AA (0% to regular), you will not level at all, and only gain AAs. You can bank upto 30 AAs this way, or spend some as you gain them. But once you have 30 AAs banked, and do not spend any of those 30, yoand keep you xp 100% to AA, you will be getting no xp or AA, you have to spend of the banked ones to get below 30 again to start earning more. Anywya, you'll just keep getting AAs, as long as you keep the rate at 100% and will not level, assuming there are AA items to purchase.
Thus you can start or stop AAs, at any level, and vary the amount of your experience that goes into AAs.
With the new system, I don't know of any way of saying how much level xp makes up an AA. It's not much at low AAs for sure. At 77 on my War, with amost 1200 AAs (over the AA bonus point), at 80% into AA, 20% into reg, and Leadership AA on (20% off the top toward it), I get a little less than 1 AA per 1% of level, or a bit more than 1% of level per 1 AA. This is killing dark blues to yellows in Ashengate, which is currently a hot zone. How many kills does it take to get that much xp? About 10-12 kills for 1AA and 1% reg xp. At 0% AA, 100% reg, I got 0 AA, and about 1% or more per 2 kills.
Yther Ore.