you would need a pretty high exp rate because some people would get tired after 100 lvl so you could start at like lvl 125 with i have xp rate so youd only have 100 lvl's to climb
gears that increase one particular stat of like 1m but you can only equip 1 at a time
quest to farm special edition or heroic mounts
rp zone
.. i dont if its possible but an island for every class , like mage island where you can farm gears for mage , a rogue island etc...
higher money drop rate