Well i lvl alot in fact most of my characters are 80+ 75-76-77 are easy just do the mission and go to WL(wizard's labyrinth) 78 just do your missions when your done WL and i find zeruel (not zeruel border) gives the most exp in general i grind there when im out of missions card your helm were sentry armor have both rings and zeruel crest and you get around 2.1 mill i have ring of beefs and 100% exp gain so i get around 2.9 mill but zeruel is a really good place to lvl and its fast especially if you have a arme with pff with you.