How Democrats regain control of the US Senate in 2020 with Warren-MA/Brown-OH ticket?

Democrats are going to lose:
AL(Jones-D) loses to a Generic Republican challenger that is not Moore-R.
MA(Warren-D) is elected POTUS-, GOP Governor Baker picks interim US Senator who will serve until the winner of the 2021 special election.
OH(Brown-D) is elected VP. GOP Governor DeWine picks US Rep. Mike Turner to that seat. Turner has to run in the 2022 special election. -3D
Democrats need to win at least 6 Republican held US Senate seats up in 2020.
1)AZ special (McSally-R) Kelly-D
2)CO(Gardner-R) Hickenlooper-D
3)GA(Perdue-R) Ossoff-D
4)IA(Ernst-R) Greenfield-D
5)ME(Collins-R) Gideon-D
6)NC(Tillis-R) Cunningham-D