Couple of thoughts
If Ball is available at #3 do the 76ers auction off the pick and use that to jump start the process?
They need a PG. they likely take Ball without thinking twice. unlikely they take Fox or Tatum but Tatum's a possibility - could use a real upgrade at SF
Do the suns offer #4 and Bledsoe for #3 and Okafor?
that'd be foolish for the Suns. they have a proven PG in Bledsoe and a lot of other holes. If Philly takes Tatum, Suns get Ball. if Philly takes Ball, Suns get Tatum or trade the pick to move down a couple of slots to still get Isaac or someone else they like.
Do the Kings offer #5 and #10 for Ball? Then 76ers draft Monk at #5 and Mitchell of Nitilinka at #10. Giving them a nice fit in the back-court next to their current pieces.
Kings are run poorly but that front office has to know that team needs a lot of talent infusion so 2 picks in the top 10 would seem to be the better bet than going after Ball at 3.
Do the Cs shock everyone and trade down from #1 for Ball and Saric? (can you say drama)
hell no. they take Fultz because he's likely to be a stud. Ball is likely to bring headaches and Saric isn't enough to justify that drop in talent and increase in drama.
CRAZY Conspiracy theory (for fun not to be taken seriously)...
DA likes Jackson over Fultz, avoids working out Jackson and leaks that he wont workout for Celtics.
DA trades #1 for #5+#10+WCS and a future protected 1st
Then trades Jae and #10 to Suns (his former assistant is GM) for the #4 pick.
Fultz goes #1 to Kings, LAL take Ball #2, 76ers are scared off by lack of Jackson workout and take Smith Jr or Fox.
Cs take Jackson at #4 and Isaac at #5
can't see Sixers passing on both Tatum and Jackson for either Smith or Fox. they need a better SF than they currently have --> projecting Simmons to move to PF based on his size and that PF isn't normally a position requiring long distance shooting.
if they did and Jackson was at 4, I'd wonder if it's be worth the C's taking Jackson and Tatum as their future forward pairing allowing Brown to slide in at SG eventually. Not completely confident of Isaac to move him ahead of Tatum at this point.
Also these proposals ignore the issue of the C's needing more top-end talent rather than depth of talent at this point. Keeping the pick for Fultz makes the most sense going forward.