If it is allowed, I'm thinking something like this:
Total PP must not exceed 1920pp
The car in race 1 must be between 350 and 390pp
The car in race 2, 3, and 4 must be between 455 and 535pp
The combined PP of the cars in race 1 and 2 must not exceed 900pp
The combined PP of the cars in race 3 and 4 must not exceed 1020pp
As for the tires, it would be nice to have CS in race 1, SH in race 2, SM in race 3, and SS in race 4.
That would require you to really think about your choice of cars and what to use where