Fastest way is use charm aug macro to 20? ish on 2 chars (or 1 if it's a wizard/cleric/whatever can pbae from the start) then /zone to Frontier Mountains with the 1 or 2 pl'ee chars and a highish level druid.
Mobs in giant fort repop very fast, just keep pulling them all, with no DS, on druid. When you have them all, use pbae snare on them all, toss a heal on yourself, use another pbae snare, ds self and then use the pbae pl'ee to chain cast the lowest level pbae nuke. Repeat until 28 ish, then druid port to Emerald Jungle, /zone citymist, and pull everything you can the same way.
At 46 /zone sebilis, do the same thing.
Usually empty zones, and in about 3 hrs played you'll be 50's.
Then set up mq2twist or whatever they call it to get your spell skills up on the pl'ee cause they will all suck hard.