2020 US Senate Election- Which Republican held US Senate seats will Democrats win to regain control?

Democrats need a net gain of 3 to 4 seats depending on which party is in the White House.
1 Democratic held US Senate seat up for re-election in 2020 is likely to go Republican.- AL(Jones-D).
If 2020 Democratic Presidential/Vice Presidential/Cabinet Secretary Candidate US Senators from States that currently have Republican Governors have to vacate the US Senate.
Warren-MA,Brown-OH,Sanders-VT,or Manchin-WV.
Warren-MA and Sanders-VT seat will temporary go Republican until the winner of the Special Election is decided, which is likely to be a Democrat.
Brown-OH and Manchin-WV seat will permanently go Republican. The winner in the Special Election is likely to be a Republican unless the Democrats nominate Tim Ryan in OH, and Richard Ojeda-WV.
Democrats need to win at 8 Republican held seats.
1)CO(Gardner-R)Hickenlooper-D
2)AZ special(McSally-R)Kelly-D
3)NC(Tillis-R)Cunningham-D
4)ME(Collins-R)Gideon-D
5)IA(Ernst-R)Greenfield-D
5/6/7)GA special(OPEN Isakson-R) and/or GA regular(Perdue-R) Ossoff-D and/or Lieberman-D
6/7/8)TX(Cornyn-R)Hegar-D if O'Rourke-D or Castro-D are on the 2020 Democratic Ticket.
7/8/9)KS(OPEN-Roberts-R) Bollier-D vs Kobach-R
8/9/10)KY(McConnell-R) McGrath-D.