Draft day trade assuming the following
Cs get 6th pick top 5 goes Embiid, Wiggins, Parker, Exum, Vonleh and #18 (from nets)
Magic get picks #3 (Parker) and #12
Cs trade the rights to #6 Marcus Smart, #18 and Bogans,( possibly more cap filler Anthony?)
Magic Trade Aaron Afflalo, #12, and Harkless
Celtics,
This trade runs the risk of placing the Cs in the middle of the pack. If they can follow up with a deal for Asik (or another defensive center then I think they have a nice team for the next 3 years. They do this without mortgaging the future as they will still have a young group of AB(if resigned), Sully, KO and Harkless. The #12 pick should be a solid prospect in this draft.
Magic,
This trade puts their backcourt in place for the foreseeable future. Smart and Oladipo should be a great paring giving this team a physical defensive minded identity. Add to this the addition of Parkers offense and Vucevics inside presence and rebounding and this team is set up very nicely. At #18 Harrell would be a great fit as would Payne or Grant. They would pair with Nicholson so play big minutes right off the bat at the 4 spot.