I've read about the exp changes over the last while, and I know you still tinkering around with it. I know that RoA is basicly the reason this AA was removed but have you considered modifing it to like a 3d cool down or something? I mean sure with the current exp rate it can still be done rather quickly (Nucca's a prime example of this), but this would help the players that don't have other boxes, or friends to help them in the quest, and this way they can knock out a bunch of lvls of the ring every few days instead maybe just 1 or 2 in that timeframe.
Just a thought