From other members suggestions, I have enjoyed these:
Alsace
20 cars, start last
Use N400 against N1000, professional, no boost,
Fuel consumption x10, so N1000 pit every lap.
N400 Vs N1000 is an easy win after 2 laps. I'm not fast enough to win in one lap.
N300 Vs N1000 is a relatively easy 3 lap win, if you can make the fuel last.
N200 Vs N1000 is much more car dependent. Alfa 4c, won a 4 lap race on the first attempt (by 3/10th). The Peugeot RCZ - will need a bit of practice.
(max power for the category, RSS and min weight - make these fairly easy, those of you who are faster than me (which will be most of you!) should probably use tyres with less grip).
Nürburgring 24hr
With Fuel Consumption x10, Gp 1 cars run out of fuel, which allow N200 cars to catch and pass them all upto 2nd, often to take the win.
Run a clean race and win 211,000 (for a 1 lap race)
Fishermans Ranch
N400 car is competitive with a Group B rally car.
Any other suggestions?
Edit: updated