Naz Reid is probably attainable this summer. I'm not sure how much you want to spend on a backup center that likely can't play significant minutes alongside Sabonis and who doesn't offer high level defense or much rim protection, but he's definitely a favorite around these parts.
The Nets have said that they'll match any deal to Cam Johnson. Whether they will or not, I don't like the idea of having to drastically overpay AND have the rest of the offseason moves be hung up while the Kings wait on the Nets' decision.
I'm not sure what the Kings could offer the Pelicans for Herb Jones. It doesn't make much sense to trade Keegan for him. Would New Orleans take Davion and the 24th pick? I don't know that it moves the needle for them.
To me, the most important of the four guys I listed are...
1) Herb
2) Cam
3-4) Either Reid or Sims, although I would like both.
I think the Pels might go for the trade you suggested. Davion fits a bigger need for them at PG since GTA is their only real PG... whereas they are well-stocked at the SG and SF position with BI, McCollum, TM3, Daniels and Naji. I think Davion will go straight into their starting lineup TBH, and the 24th pick is a bonus.
I think it will be hard for the Nets to match an offer for Cam, and other teams are going to test their resolve there. Their active roster cap is already $146,428,035... not including cap-holds for Cam and others. So if the FO can somehow get Cam... coach Brown can go either...
Bigger: Fox,
Herbert, Murray,
Cam, Sabonis.
or
Smaller: Fox, Huerter/Monk,
Herbert, Murray/
Cam, Sabonis
... yet will always have enough spacing on the floor, while having Herb as the lead defender on the opponent's best guard or forward.
Josh Hart is too small at SF, especially with Murray being undersized at the 4 and Sabonis being undersized at the 5. He is better at SG for this roster... like in: Fox, Hart, Murray, Cam, Sabonis.