I think Philly would be hilarious, because Simmons and Ball don't seem like they'd be compatible together. They both need the ball in their hands to set up others, and that's just taking even more touches away from their best player in Embiid.
Philly should make a hard push for Fultz, who would fit absolutely perfectly for them. If I was Philly, I'd trade number 3 to Sacramento for numbers 5 and 10 and then offer Danny Simmons and number 10 for number 1. They could then take Monk at 5 and a really good core moving forward of Fultz, Monk, Covington, Saric, and Embiid. I love the two-way potential of that group, and I think it fits much better together than anything they'd currently get at 3 to add to their group.