With all the posts about leveling a Human from 1-10 extremely fast, I thought of a way to capitalize on this using RaF. Get your main account level 5 and lock their exp gained, and run them to the murloc spawn area (Crystal lake). Create a new level 1 human on the same realm and get them full BoA's (Trivial now because they can be obtained with gold. I would recommend priest.)
Equip all the exp Boa's and a BoA Weapon, and run your way to the murloc area (or be summoned by RaF summon) and start killing the murlocs. You want to level from 1-9 because the exp slows down tremendously at level 9-10.
With the triple exp and decent attention you can get from 1-9 in approximately 8 minutes. This means you gained 4 bonus levels in 8 minutes, and that means you need 23 runs to have 90 bonus levels. This would take approximately 185 minutes to get enough bonus levels for 1-90. Then you grant the levels using a level 90 character on your Referred account (assuming you already have one).