I see this as a can't lose situation for Danny. Suspect it was Okafor he almost made a deal for last trade deadline for the 3. And some of the media seem to agree. The Colangelo-Ainge-Phoenix connect probably helps at least to overcome the traditional Celtics-Sixers hostility.
Noel has also been discussed, quite the opposite of Okafor (D vs O). Hard to say what Ainge-Stevens would prefer.
Then you have Bender, who is similar to Porzingis, so you know what to expect. His main benefit is he can shoot outside over everybody. Neither of these guys is ever going to dominate inside, in my view. But both are nice players who can shoot and have the height to play inside.
The kid that has really caught my attention is Thon Maker. HS kid--but actually older than Bender--just over 19. He looks like a young version of KG--but with a 3P shot. He is more athletic than Bender, handles the ball like a PG and can play above the rim. This kid has the most upside--could be a monster player. Most drafts have him 16 and above, but I suspect this kid will get drafted in the top 10. Bigs with his skills go first in the NBA draft.