This haze you're talking about, are you in Malaysia or Singapore?

I can see insanity as fire because a lot of people associate fire with chaos, and associate insanity with chaos as well.  I don't personally like that interpretation of insanity as the maniacal laughter, Batman joker-style madness, so I think water works better.

I'll go with Longing (Earth) and Insanity (Water) then.  I'll need to work on characters.  What do you want in the CS?  Will there be other themes that our characters need to follow in addition to element, for example, do they use a magical weapon of some sort?