You people are over reacting, well some of you. Right when one of you hit fatigue/surplus you go into /panic mode and think that a 10% drop in exp and/or exp will make hours of difference. Just grind through your surplus if you really want to rank it, it will not make a huge difference. I have gotten myself up to T5/6 surplus and by then I would just switch classes. Rank more than one class if you hate surplus, but do not think a person grinding for 1 hour will get the same as a person doing 5 hours with T1 surplus. If you still do not get surplus or how it works, here is a great video explaining it.

http://www.youtube.com/watch?v=abE09-tqhoM

This explains the fatigue system perfectly...The numbers have changed a little since then, but in essence, this is it.