You didn't ask me specifically but here goes... I think the solution you have proposed is not ideal and is in fact terrible for a lot of reasons! I'd like to propose a different solution. Starting at 51 you gain a number of AAs equivalent to your level every time you ding. Under my proposal at 51 a player would be granted 51 AAs at 52 they'd be granted an additional 52 AAs (You'd have 103 total AAs to spend at this point) continue this each level until 100. This would give everyone a base of 3775 AAs at level 100. If the 3775 total seems low you could double the grant every 5 levels (51 = 102 granted, 55 = 110 granted, 60 =120 granted, etc ) if my math is correct the total granted AA would now be 4500 AAs by level 100. This way you don't instantly negate the bonus XP curve for AAs, and you don't force a bunch of useless or possibly detrimental AAs on players, and it has the added benefit of allowing players to stop and grind out AAs at lower levels if they want to.