If you are VERY BAD (for the spells) and want to become very good again, but you don't have any quests remaining, go to Cliffside path as show in picture in this post. There are unlimited Undeads spawn giving + 2 good point each kill. If you already finished the game and have Avo's tear or Sword of Aeons then they will die in one hit. Pretty easy. Combine with Physical Shield and you can farm Combat Multi until you get pissed off and go to play something else
.