That's a weird bunch of teams give by Wojo with some of them being poor fit. It looks more than he is just summarizing all the various rumors about Smith.
I'm warming up at the idea that Smith might be a good addition for Spurs as long as Spurs don't give up Kawhi or Tiago for him. For example, I think he would be a better addition than Al Jefferson.
After looking at both teams roster, the best offer Spurs could make, without a third team involved, should be:
Jack, Bonner, Blair, Joseph, 2 first round picks and cash for Smith and Tolliver.
Jack and Bonner are to match salaries and avoid Spurs paying some luxury tax. The cash sould cover Bonner 13-14 guaranteed salary.
Blair would give Atlanta another solid PF to partially cover Smith loss.
Joseph is a decent young prospect who can end up as Teague's backup.
Neal could also be included but I don't see Hawks being that interested in him. The best use to make of Neal in a Smith trade would be to trade him to a third team that gives Hawks an asset in return.
Hawks would need to cut Petro to make the trade work but it isn't an issue.