100 * R^2 - 3200/7 * R + 522.449 > G > I
(Finite area restriction)

Wastechains being banned for the first metric was a clear hint to me that this was @inf related. Fitting a curve on a few rate data points was enough to make me confident that this is just a function of rate with no second variable (Probably?)

I tried a few designs with hexarms, trackloops, and wanding but nothing beat this simple first attempt. Min G prediction: 700g