Fastest way to level from 40-50?

[Legretta]

Dungeons are good for lvling, thou may not always be the fastest as yiour geting randoms in DF. So you may get a great group or you may get a bad group. Thou I usually run in to good groups in DF for lvling. But if your looking for more exp(possibly the best) for time investment, Northen Thanalan would probably be the were to go. Its a small map so fate are close, if your server is doing the same as the one im in then ther farming the fates like crazy from 40-60 in Nthan. I always see fate groups for Nthan in PF, im not sure how it is for your server but i would sagest Nthan if there doing the same. Thou i wouldnt sajest going all the way to 60 with the Nthan fates, its doable but thats some insane grinding to do all the way to 60.
It also would be based on what you enjoy the most while lvling, for me fates will put me to sleep so i can only farm them for so long. So i persaly mix it up, i do fates and dungons for lvling the classes i still have to lvl.