Get three Enlightenment Runes and equip them each on all three slots. Get the Collar of Kinky Education and equip it.
- You can buy this from Amber after acquiring the Temple Checkpoint Gem.
Go to the church and talk to Lucille when praying to the Goddess, go to temporary Blessings, get the Blessing of Sexperience for 5000 points every 7 days. Go explore the mountain (Mostly at night because of the exp bonus, though the monsters get a boost also.) and fight mimics until you get to whatever level above 100 you want to be. You can skip the normal mobs by just running away because they are not neccesary.