Gimme one of the top forwards and Skal and I'd do it since I also like several of the bigs that will be available at 10 and our backcourt isn't a glaring need. Tatum is a scorer and Jackson's an elite defender. Skal has shown promise and add Markkanen to replace KO cheaply or one of the Collins and that's a haul.
But that deal is conditional on both sides. You take Fultz, who is the surest thing (though not a lock IMO) in the draft, and then see who's left at 5. There's no way that you can count on Fox or someone else going in top 4 thus ensuring that Jackson or Tatum are there and if Ball's at 5, SAC doesn't do the trade.
It's Danny's call though and I think he's going with Fultz since apparently, he isn't working out for anyone else.