Thank you Chrome and co. for the seasonal tips. I got my 4 million easily. I used a Clio (at stock weight) for Rome, an F40 for Sarthe, and a Camaro for the drifting.
It seems that with the Subaru you can usually only do one input at a time, gas/brakes often doesn't mix well with steering, especially on turn in. I dropped my front spring rate a bit too, but haven't beaten it yet. Very close.