Seeing as it's most likely a one year rental, I don't think it'd make sense to give up any assets for him.
why would you assume he would be a 1 year rental?
1) He’s on an expiring
2) If traded for, there would be limitations on the contract he could be offered next year.
3) We will be very tight/in the luxury tax next year, and keeping Smart will presumably be the first priority. That negotiation could drag out a bit, by which time Okafor could sign elsewhere.
4) We currently have 11 players under contract for next season, potentially 2 1st rounders, and again, Smart should get first priority. That could leave one roster spot.
There are certainly scenarios where he stays, but they require a combination of multiple events, including him playing well enough to warrant staying but not so well that he prices himself out of the limited deal that can be offered, the Lakers pick not conveying, Smart either taking the qualifying offer or leaving in free agency, and Baynes leaving in free agency. It’s possibel he stays, but the base assumption/expectation should be that he’s a one-year rental, and presumably that’s the hang up on the Celtics trading for him, since the interest is obvious.