i know its prolly too late now, as the double xp weekend is gone... didn't find this post in time with the latest website changes
but yeah, I've leveled a toon from 1-90 with 250aa in 2-3 days several times.
having a SK/Zerker/Paly w/ good power regen is also essential. Raid gear helps too. Theres a few power regen items that make it really easy. forgot the item names, but I know theres 1 robe that makes you have infinite power. it gives you 10% chance at 500 power every time you kill a mob. thats a lot of power when your blue aoe'ing dozens of mobs at once
RaF is essential, without it impossible. I do 1-20 anywhere, just getting to the docks will give you like 20 levels if you pull every mob in sight along the way
from 20-55 i just zone in and out of rock crawler caverns like 100 times, then from 55-70 or so I zone in and out of scornfeather's roost. from 70 to 80 you can do sebellis or whatever... usually at this point i just go to sleep and turn on the bots and have them fight all night long in a instance with instant repop... wake up next day and be like lvl 81, then do The Hole xp grinding for as long as you can possibly endure, then when your bored, turn the bots back on in the zone w/ instant repops and wake up the next morning and be lvl 90. i've done 1-90 in about 16 hours, however 250 aa usually takes another 24 hours