thanks for the suggestion darkdragoon, but Kerning City is not the best. The lower level enemies (if you're high level) have an abysmal drop rate. Fighting some higher level stuff, even less of them, was better overall
Oh, sorry about that; I haven't been training at monsters around my level(140-150) in the last few months so I haven't noticed the drop rate change. All I've been doing most of the time for leveling was kill Papulatus or Red Leaf High.