This just looks...wierd. I can see 1-e Precogs, but in general you'll get faster results from Supernova by having stuff to play when you cast it. Having to wait for another Supernova when you've got too many Precogs is just...lame.
I'd probably stick with the basic theme, but take out 2-3 Supernovas and replace them and 4 of the Precogs with cheap rainbow critters.