Some random ones:

Toronto: Chicago back in the Butler era for obvious reasons. Same with the Kings back with DeMarcus Cousins. Suns and Magic last year were weird ones for them as well.

Boston: Toronto gives them issues in the reg season.

Spurs: In the Chris Paul era the Clippers were 10-7 against them the last 3 years including playoffs. Even now if we exclude obvious answers like Golden State they still are a decent choice; just too much athleticism in the Clips front court with DeAndre and Blake Griffin.

Utah: Theyve overcome the Clippers curse in the playoffs last year now the next best answer is the Spurs. Look at their recent reg season track record vs them.

Golden State: Memphis. They have a winning record against them the past few yeras I believe. Evne GSW has talked about how Memphis is tough for them.

Cleveland: Chicago in the Butler era always used to give them a tough ass game. Now days Washington's offense in the east at least really can stress that Cavs defense they dont have answers to guard that back court.

Clippers: GSW. 10 and counting for losses vs GSW past 3 years. Memphis is another team they always dont like to have to see

OKC: GSW just crushed them every time they played last year. Portland also surprisingly went 3-1 vs them last year.

Wizards: 0-4 got swept by the Heat even when they started 11-30