I've been buying a chocobo for 7 days (you may need less) and camping near the hunt area. At camp I eat, Lasagna al Forno. I add on moogle charms on everyone and head to the hunt. If I kill them all and select "Go back to last resting place'" All I have to do is get on the chocobo and return to the hunting grounds. I get around 1-2 million EXP during my food gauge. When I need to sleep, I go to the x3 EXP hotel.
You can get the ingredients in
- Jabberwock Sirloin (Meidacio Hunter HQ)
- Cleigne Darkshell (Alissia)
- Fine Cleigne Wheat (Alissia)
The Inn is in Altissa (There is two clerks the one on the right is the x3 exp. Costs 30,000 -> 15,000 a night. You may want to get greens for your chocobo during the nights.