Anyways, someone told me yesterday that if I switch jobs as soon as I get fatigue, if I don't touch that job for 2 hours I will have 1 hour of exping back without fatigue. Trying 10 hours later and I'm still fatigued lol. It's weird though, my Archer ALWAYS gets fatigued but, my Lancer chugs along with no problems never getting fatigued. Last time my Archer got fatigued I went 7 days with out touching it and did nothing but level Lancer and it still didn't get fatigued. But my Archer gets it again a day or 2 later.
That's not quite how it works, the 7 day explanation is closer to how it works in the real world. The thing is, the first level of fatigue is only 10%, so unless you are 5X linking leves every single day for 8 hours each time, just grind through it 'til it resets. But you won't be able to make it reset any faster by switching classes, not in my experience any way.
Oh, one other thing to note; IF fatigue is ready to reset, your sp will still show in yellow until you earn your first point of SP again on that class, then it will go away.