I'm pretty sure how this is going to work out:
Celtics: 1st
76'ers: 3rd, best of LA/Phi 2018, Sac 2019
Then the 76'ers takes Jackson with 1 and LA Lakers take Ball with 2. The Kings want to trade up to secure Fox.
Celtics: 3rd
Kings: 5th, 10th
So the Kings take Fox at 3, but the Suns have a higher need on the wing than in the backcourt and take Tatum at 4.
Celtics take the guy they want with Fultz at 5 and have collected some extra assets in the process: 10th pick, best of LA/Phi 2018, Sac 2019.