Here's an image that is a combination of past suggestions. I used the image by Lex, only made some changes.
(
http://www.screenshotdumpster.com/)
Three rings represent "Elemental Groups".
Outer ring is "Reality" or whatever, then we have "Spiritual", and the middle ring is "Material"
Red lines represent opposing Elements.
Blue lines connect the second group, "Ally Group" (names suck, I know). So each "Ally Group" has one element from each ring.
Lastly there's the old "good" and "evil" that everyone love.
I like this because "ally Groups" have pretty good synergy and everything looks to be in a pretty good balance.