After slaying Medusa when Aphrodite tells you to slay the minotaurs, don't use medusa's head. Instead, use poseidon's rage over and over again since you have infinite magic. There are infinite minotaurs. After a while the minotaurs don't give that much orbs so you should build a high combo. Maybe about 200+. It could be a little hard, but if you use poseidons rage at the right times, you can get a high combo for extra orbs. And you can always use the circle minigame on the minotaurs to get health if needed. Also, to avoid getting hit you can roll if youve powered up the blades at least once. If you are closely surrounded by minotaurs and use poseidons wrath (need to power up poseidons rage once and repeatly press circle) you will get a massive amount of combo hits maybe 50 or 60. Good Luck.