Getting Ayton first would be key. Agree to Olynyk, Diallo, and draft capital to keep the Suns below the luxury tax.
Next is getting Sexton in a sign and trade for Grant. Cavs get a string wing defender and Piston secure their back court.
Sign Kyle Anderson for around 15 as he could help replace a lot of what Grant did as well as lead the team.
If possible bring back Bagley for around 10 mill. I believe they'd need to rescind his qualifying offer to make these other deals go through but they have some cap space and the mle left to use for him. He'd have to know he's likely a bench player but would get ample opportunity.
They'd have a strong young starting 5 with the only player older than 25 being Kyle and a strong bench with a plethora of guards and Beef Stew and Bagley in the front court. They'd also have the 5th pick to still add to this.