So I will have to credit my friend who found this. This exploit requires Hydra + Life on kill =life gear. If you have life on kill gear and you "spam" your hydra it gives you life because the game registers it as mobs dying. Also noted that with the 3 heads on the hydra they register as three mobs dying. I searched for Mage, Hydra, Hydra exploit and did not come up with anything in the search results. I do not know if this is in the elite as I don't have access but please more people feel free to test it out and post your comments.