I like a challenge, but in my opinion, your could have divvied up the elements a little bit differently.
Good (Canon):
Light
Life
Evil (Canon):
Dark
Poison
Fire
Those are really the only elements that are OBVIOUS candidates for those. I don't see why Earth has to be evil. Imo, the Earth is actually a pretty cool place to live on. Entropy is randomness; it could be either. Time is just... time. It could also be either. Water is probably swayed towards good, and aether is pretty much swayed towards evil. But both could make sense on the other side as well. And air and gravity are both just forces too; neither evil nor good.
It just doesn't make sense how you divvied up the elements since most of them could go evil or good. But you decided to give good all the lighter colored elements and evil all the darker colored ones, which as others have pointed out results in something rather imbalanced. Instead of going by the "color" of an element, which it seems you did, you should put the canon elements on the sides they need to and then work from there.
I would have more fun knowing I have a *chance* at winning, versus knowing I'll probably lose.
Here's what I would do:
Good:
Light
Life
Water
Air
Earth
Gravity
Evil:
Dark
Death
Fire
Entropy
Aether
Time (Chronos = somewhat evil titan >_>)
Basically I swapped earth and time. So now good has that amazing gravity/earth synergy, can protect its permanents, and can also destroy some. And evil has two instead of one element with permanent control.