Quote Originally Posted by GodsRage View Post
1 million exp points (A billion will get you to about lvl 100)
one exp pack will get you from 51-66
A second one will get you from 66-78

I would suggest doing the mainline quests. While not getting you there as quick, they are a lot cheaper.
Old man have you ever used the xp pouch? it gives 1 billion xp points. 1 exp pouch gets you from lvl 1 to lvl 66 and it takes about 4 or 5 xp pouches to get to lvl 90.

XP Pouch [1,000,000,000 EXP]