Random Acts of Karma

You might find this article interesting, which explicitly connects the "hero's journey" of Gilgamesh (who is, in many ways, the prototype of Heracles) to the Sephirothic Tree of Life, which the author asserts (on archaeological grounds) is Mesopotamian in origin (like astrology).

I'm afraid my studies have taken me in a very different direction, so this material is rather beyond me and I can't vouch for it, but perhaps it's of use to you!