I just did the drive this past week, and back-up to Paris today.
The Peripherique is your problem. I'd strongly suggest taking the A1 from the airport to the A3 and pick-up the Peripherique on the East side (around 3 o'clock) and avoid a large slow section of it. Then follow round clockwise to the A6 (6 o'clock ironically) down to the A10 and onto the A11 (start of the peage). All in, with some hanging around on the Peripherique, it took me 2 hours exactly to the track exit at le Mans. Piece of piss - I hung-out at a steady 160 Kph, but did see what I assumed were a couple of radar vans on the opposite side of the freeway - unmarked red vans with what looked like a couple of radar cameras on tripods pointing back at oncoming traffic. I'll be thumping back down to pick-up the Mrs. and crumb snatcher on Thursday. Good luck!