If Ainge really does have Hayward in the bag, you'll see that in what he does at the 3. If he does, he'll draft Jackson. And if Jackson's not there, he'll draft Isaacs. The other option is he trades the 3 for Butler or George.
You have to figure he's going to sign Hayward or Griffin, maybe both. If both, he doesn't want any draft picks. Tatum figures in only if he can't sign a scorer.