Assuming we keep all picks, I think 18 teams are snap calls (although I guess there's a viable argument about not wanting to trade with Memphis because we'd only have a tiny championship window during which we'd have to burn every pick we have to put another piece alongside Gasol, Zbo, and Conley).
Here are the 7 I think you obviously wouldn't trade with and the 5 I think are debatable.
<Obvious>
1. New York
2. Charlotte
3. Brooklyn
4. Phoenix
5. Denver
6. Dallas
7. LA
<Borderline>
8. Toronto
I don't think I'd make this trade but it's close. Lowry is clearly better than anyone we have but if we're relying on our picks to rebuild, he's the wrong age for our timeline. Comparing Lowry v. Smart, obviously Lowry is the superior option if we want to trade our picks for a superstar, but if that's not possible and we have to rebuild through the draft we'll end up stuck with a declining star on the wrong side of thirty while we wait for Ben Simmons or whoever to mature as a player. Smart isn't anywhere near as good as Lowry right now but he's better in terms of preserving our flexibility.
Derozan and Valenciunas are nice players, but ultimately they don't move the needle that much.
9. Detroit
Drummond has bags of potential but other than him the rest of this roster is more or less trash. If Drummond doesn't turn into a star I'm not sure the Reggie Jackson/Brandon Jennings/Stanley Johnson pu-pu platter is worth much more than our pu-pu platter. I guess I can talk myself into doing this because Drummond is such an attractive big-man prospect, but it's not as much of a snap call as you'd think.
10. Indiana
"Build around Paul George" sounds like a great idea but even moreso than Detroit, there is literally nothing here other than him and the chance that Myles Turner turns into a good player. If George is healthy and 100% then obviously you make this trade because he's a transcendent superstar, but I want to see him play at least half a season before I pull that trigger.
11. 76ers
Noel v. Smart is more or less a wash. Okafor looks decent but even if he turns into Al Jefferson, that's not necessarily a championship piece. If you swap rosters with the 76ers you're pretty much betting that the chance of Okafor becoming a star is greater than the chance of any player on our roster other than Smart becoming a star. I'd have to think long and hard before I made that determination. That said, once you factor in the chances of Saric coming over in a reasonable timeframe+being good and the tiny, tiny chance that Embiid isn't just the next Greg Oden, I guess it's just barely worth it.
12. Portland
Dame Lillard is amazing, but he's strictly a one-way player and probably won't ever be anything more than the 2nd-best player on a championship team. The rest of the roster is a few nice role players, a couple of long shots that may pay off (Vonleh, Plumlee), and a dozen or so utter and complete nothings. Is three Brooklyn pick enough to put a championship team around Lillard? I don't think so, which is why I wouldn't take this trade, but I can see why someone would decide otherwise.