Ive only been to two areas that are above my level, Zertinan and Feywood. I went back to Zertinan before I went to fight the Elder Wyrm and found it to be the best area to level my characters. I rose from level 32 to level 40 in only an hour or two.

I think the developers fell into a trap, they tried to make the game non linear by letting people venture anywhere they want without ( many ) restrictions, this makes players unfairly die even if there careful. I felt cheated when I got killed by a group of werewolves when I first entered the Ozmone Plains to then have to go back to my save file several hours behind where I was.