The Celtics should trade out of this draft completely.
The team already has a logjam of backups and role players like Al Horford, Payton Pritchard, Jordan Walsh, Oshae Brissette, and Hauser. If they resign Xavier Tillman, and extend DWhite, that would give us 11 players. We don't need 11 players, and we don't need to add any more young role players. We can always use stars, but that's probably not happening late in this draft.
Bundle picks for future trades, especially as this team gets really expensive with DWhite and Jayson Tatum's deals. If they trade out of the next couple of drafts, they may be able to consolidate picks and/or add great pieces like we've done with DWhite, Porzingis, and Jrue Holiday.