the solution is simple, double or triple current post-65 exp. aka, AA's and tomes. in the "current" (read: 1+ year) game there is literally no downside to doing this. it's a LOT easier and practical to balance the future game around what the game really did become under marza.
i'm not saying its his fault, it was necessary for him to consider peak exp when balancing things to make them truly difficult. most importantly, it worked. the game was at its most balanced before slaar and woldaff took an axe to it.
you could literally roll this game back a full year and it would be a better game. that should bother you guys.
at that point, the problem was "it is too difficult to get the exp required to bridge tier 12" and the solution was either the easy part, to let go of the past and just increase exp, and balance future content (lol) around people having 20+ tomes, or the hard way, to nerf all of marzas fights and items and not follow up on it properly, leaving the game in disarray, driving off the most popular guild and loyal players
i've had max tomes for ages and i did it before everything was nerfed, its probably twice as hard now. along the same lines, i had around a full year of using a multitude of items before they were nerfed and now un-obtainable, and i'll be the first to tell you that that is poor design, but a great way to screw your dwindling playerbase