Look, what I'm not seeing here is a discussion on the following:
Ainge has shown a strong reluctance to reach on high risk / high reward players from Europe in the past at far less valuable picks, typically outside the lottery. The Greek Freak over Olynyk is an example of this, but there are plenty of others.
He's literally never done it. The only european Ainge has ever drafted is Semih Erden, who he took 60th.
Do folks really believe that he's going to change his approach with the 3rd pick, which is far more valuable? Isn't it likely that he'll prefer to take his typically more safe approach, and go with a Dunn, Murray, or Hield? I'd say it's certainly more likely, though not necessarily a given.
I'm beginning to think that if Ainge can't find a trade partner for a veteran (or one of the teams positioned 4-6 in this draft), he'll take the best of those three above, and look to move Smart + future picks later for a veteran scorer.
He'll THEN take a couple of cracks at folks like Maker or Zizic later in the draft, because he pretty much has to (needs them to play overseas for at least a year).