Danny Ainge set the standard for building championship teams when he traded for KG and Ray Allen.
That is a team needs 3 very good/great players that fill different roles.
Those roles are:
1. a big man (PF/C) that will anchor the interior defense, rebound and be a force on offense as well. Think: Garnett, Draymond, Duncan, Bosh
2. a scorer, preferably on the wing. This scorer can score in multiple ways, iso, 3, slash, mid range, get to line. Think: Pierce, Curry, Ginobli, LeBron, Wade
3. a knock down shooter, usually at guard to spread the offense. Think: Ray Allen, Klay Thompson.
The current Celtics do not have a 1. They may have a 2 in Thomas. Have hopes that someone on the roster can become a 3; maybe Bradley or Hunter or Young.
So when thinking about roster moves or draft moves. This is IMO is how Danny and crew approach it. Which role will the player fill 1, 2, or 3?
Now these types of players are generally found at the top of the draft.
In middle and back end of the draft you hope to find the glue pieces or the specialists. The excellent defenders (Bradley, Tony Allen). The hustle players/rebounders (Perk, Bass, Powe, T Thompson). The distributors (Rondo, Parker). The secondary shooters.
The team now has a lot of glue and hustle. They need the 123.
2's are the hardest to find - a player that can go for 30 ppg any given night. (Durant)
1's are the next hardest to find - a player that will give you at least 16/10 every game. (Cousins)
3's the least difficult - you better not leave him open, 38+% from 3pt range and not afraid to shoot it.
So where does Bender project? Hield? Murray? Brown?