To what elements/forces do each of the senshis' powers correspond to in their attacks?

So far I have the following:

Mercury: Water/Ice
Venus: Metal?
Mars: Fire
Jupiter: Wood/Air

Saturn: Earth (In the more primordial sense)
Uranus: Heavens/Air
Neptune: Seas
Pluto: Time and Space 

Usagi/ChibiUsa: Life

I'm basing this not only on the Silver Crystal, but also on the basis of their respective attacks. Halation would be the "Breath of Life" (which can be used to exorcise demonic beings), and the various heart attacks are either an infusion of love which would be experienced as a form of Hell by the various daimons they fight, or in a more literal sense, Usagi tears their hearts apart with her attacks. 

This just leaves Mamoru.

Mamoru's powers seem to be connected to healing, sentience, and reason (ie. Cosmic man).

Thoughts?

I personally believe that Mamoru is purposely not associated with an element as he is supposed to represent humanity.

I like that Henshinyo. It really fits him.

That's what I mean by Cosmic Man.

He is bound to the Earth through Helios, and thus is the voice of the Earth, and all creation.

It would have been nice to have seen Mamoru display some of that power in relation to speaking with animals and plants.