I have Violet Blast, White Snow, and Moss Rat orbs. I'm using the Academy helmet, and I have found at least one door that I can't open. I'm guessing one of the others is behind that. Violet Blast was on a glowing path suspended over the main entrance hallway and accessed from the balcony. White Snow was on an altar in a chapel, and Moss Rat was in a cage suspended over the vault and accessed by jumping from platform to platform, some of which were visible with the Academy helmet and some with a regular helmet.
The orbs I'm missing are Blue Moon and Fire God.
Thanks for your help!
CharlieMac
