Honestly thinking the FL GOP Could go as far as 8-21 .
Cut FL 5th(I hardly doubt either supreme court thinks FL 5th follows Gingles as a compact community and keep the Likely R Tallahassee seat and try to make a lean to Likely Jacksonville and one like the current FL 4th.
2 Orlando/ 1 Tampa to St Petersburg/ 5 SE FL sinks for D's and try to shore up all Cuban seats to vote for Desantis/Scott.
A lot of seats will be thin, but I can't see anywhere where another sink would massively help R seats. Lastly out of the 3 white D SE Fl seats you could try creating a swing seat from the beaches?
7-1-21?
The one sink that I could really see helping is maybe the old Corrine Brown district but that would be too controversial to make IMO.
Pretty sure you need 6 SEFL D districts with population growth. And no, you really can't draw a swing district. Not nearly enough R-leaning precincts.
You also have to think about incumbent residences and demands before going all out on a gerrymander.