LV Koopa
Jester from Hell
Giannis and Middleton at the 1 and 2 could switch on the 2-5 and 1-5 pick and roll. They can match up with Ayton when he rolls and switch. Size.
Drue or PJ being on CP and switches on Ayton is not going to win down in the paint. That's too easy. Having a bigger size on Ayton with Giannis and Middleton can help, I'll take my chances with that matchup.
I don't think it will help too much, since Giannis isn't 100% yet. They can only play big for so long because Phoenix wings just going to eat all day if you don't have Giannis in help position. Bridges/Johnson/Crowder being guarded by Connaughton/Jrue on help isn't really a win for Milwaukee. Bridges himself is better than everyone on Milwaukee outside of Giannis/Middleton. They also don't want to switch every Pick and Roll, as Jrue was doing really well for parts of the game going through those screens. Giannis is not a great on ball defender anyway and the real issue is they are missing another guard that is good on defense (DiVincenzo instead of Forbes is big difference).
I picked Suns in 5 because they are a tier better due to them having so many lineup combinations that kill Milwaukee.