Please forgive me, I was trying to give as much info as I can and didn't think about listing their elements. They are grouped by element, so it will be easy to tell you who is what. Nergal through Amon (First 4) are Fire, Rusalka through Oceanus (5 through 8) are Water, Boreas through Heimdallr (9 through 11) are Wind, Indra through Hermod (12 through 15) are Thunder, Mephistopheles is Dark, and The last 2 are Light. For Quick Reference I have 4 Fire, 4 Water, 3 Wind, 4 Thunder, 1 Dark, 2 Light
When I get to Medusa I'm usually about 1 or 2 attacks away from being at full burst (There is only one group of 3 guys before getting to her). It will take me about 4 turns to deplete her rage. Usually by the time I get her to rage she is either right at her burst or one away, and then about every other attack from her is burst, because after she uses it she automatically has 1 of the 2 burst counter lights lit up. So by the time I get her down she's able to use it about 2 times, sometimes 3. I've tried putting Amon in the Rear section starting out and have my other 2 healers as backup, however it doesn't turn out as well as putting her in backup position.
Thank You again for your replies, I appreciate you taking time to help me out.