Wow, I was just checking and man is this looking hard to pull off I'm sorry to say. I did try to search for league for you too look into (figured if you putting in absolute worst of the worst strategies, you could probably keep in the last place slot if everyone is active). All leagues have 28-31 drivers in Elite
MTWTFSS 10:00igp-fuel igp-tyre md-stopwatch igp-car 1 chronometer 100% md-speedometer 2x
6 races left in season
League not found or inactive
13 races left in the season
MTWTFSS 00:00igp-fuel igp-tyre md-stopwatch igp-car 2 chronometer 50% md-speedometer 1x
5 races left in the season
League not found or inactive
13 races left in the season
League not found or inactive
3 races left in the season
I unfortunately don't have the time to check through more time slots for leagues. However as another idea, if getting your self demoted doesn't or is unachievable, another idea if to create a second account to race in Rookie to get promoted, rather than trying to get demoted as typically most rookie divisions mainly get inactive players coming in which are very easily beaten.