Art,
Keith really helped me out by pointing what should have been obvious to me (this of course would be no news to my wife). Getting into 3rd early for the final turn onto the main straight as I was dealing with a super twitchy car at speed through that jink-slalom. I had to upshift to third somewhere along there (2nd runs out at 68mph and I was on the limiter by the jink-slalom devil), but short shifting and getting into 3rd sooner was the key.
He also said to try 2nd out of the turn-around. Even though it was a super slow exit, there is plenty of torque to reach the tire's limits relatively quickly. I was wasting time trying to manage wheelspin/drifting in 1st and then having to do a 1-2 upshift mid-late-turn on the VDA. Just staying in 2nd solved those "fun" issues and allowed me to focus on "tight is right" and trying to stay right on the limit around that left.
Thanks Keith, I really appreciate the discussion. Thankfully you didn't follow up the 3rd gear early discussion with "isn't that obvious", or "how long have you been doing this again?"

Oh and thanks also for the tire pressure tips.
Art,
Are you getting lots of rollover with the Rivals? You might want to experiment with lower pressures. I'm running 275/35-18 all around on 8.5/9.5 wheels, and the 275s up front, while pinched a bit, are working well (I think). I had been running hot pressures of 38/36, but at this event I went down to 35/33 after talking with Keith about what he's running. I still had no significant rollover issues at those pressures which you can't fathom how on a camber challenged strut car with minimal adjustment (i.e. I have -1.4 up front) how happy that makes me.

(after years of E46 pain in D-stock years ago).
Also, you might want to consider trying 275/35s all around on your 8" wheels? I have friend in FL who is actually running an E39 M5 beast in F-street (M5 has 8"/9.5" wheels), and he went with the 275s pinched up front year and is doing really well with the car, and his front tire wear is much improved (the M5 has ZERO camber adjustment from the factory and is stuck at -0.5, so he's dealing with that fun issue).