In the quest where you must kill Maze there is an easy way of gaining all kind of exp. Fight him until he gets in the lighthouse. After that do not follow him! Turn back and climb up the stairs until you reach the bell. Behind it you'll find out a witch spawning everytime you kill her. After that its easy since they die in just one strike. The trick is to make a big combo. Personaly i made combo of 180. Keep killing the damn witch as many times as you think is enough.