Quickest way to level up now?

[Anienai]

Transfer your character to a world in Dynamis (for free, since it's a new world) and take advantage of the "Road to 80" for 90 days.
"Road to 80" doubles all experience for classes under 80, including doubling other bonuses like Armoury Bonus and Rested Bonus.
You'll level outrageously fast.

This is the correct answer.