The obvious, easy, logical KD trade not being discussed ....

[F Gump]

It needs to be underscored that the Mavs will probably only have minimum salary to offer a free agent, so they have to find this savior on offense via trade, But the better he is, the less likely he is to be available via trade, because the competent GMs of the NBA aren't likely to let their highly-skilled offense creators get away.

Sadly, the Mavs currently lack a GM who understands the value of a player who can create offense, so there's that. Hopefully that will change.