Step one- go into a dungeoun that you know what floor you know has the white circle thingies that either put you into the shop or make you duel a boss. Second- choose a job that is not maxed out. third- go to the floor with the white circle trap thingies and step on it. fourth- if you get the shop just excape the dungeoun and step on it again. fifth- have ranged attacks along with you(5). sixth- kill it(lol short and sweet) and seventh- collect your 8k exp and 1k jp. Escape and repeat until all your jobs are maxed out and you are level 99. Side Note- I did this on the 100 floor dungouen on the 80th floor.