Mavs side
Jimmy Bulter, Kuminga, Hield
The Mavs get younger and receive talent in Kuminga, Probably Butler won't play a single game for the Mavs they just take his contract to get rid of AD and reiceive pieces. Getting Hield for Klay makes you younger and gives u FRP swap in 2028, which could be pretty decent.
To be Honest I don't think Kuminga is going to have a bright future next to Flagg, except one of the them becomes a lethal shooter.
Lineup wise Naji could be the 6th man again and Kuminga would be the 4 next to Coop and Christie (and the Goat Dwight Powell)
For the upcoming season Kyrie comes back + a lottery player (Hopefully a PG like Christian Anderson or Kingston Flemings and NOT Mikal Brown Jr bc he is a fraud) in the offseason they sign a second center (Mark Williams or Mo Wagner) and are a true contender
Guards: Irving, Williams, Lottery Pick, Christie, Hield, Hardy
Forwards: Flagg, Kuminga, Naji, Caleb Martin, PJ, (Butler)
Center: Dwight Powell, Lively, Free Agent
Warriors side
AD, Klay, Gafford
The Warriors just upgrade their Frontcourt with Gafford and AD. They don't lose anything important for them , Jimmy is gone, Kerr hates Kuminga and Buddy just plays because everyone is injured. Even though Buddy plays the best basketball this all season the last 3 games, we know he is super streaky and won't keep these performances up, so they trade him for Klay. I just think Klay is a guy, when he shoots you think the ball goes in and the warriors need those guys.
Also the Klay comeback to the bay would be super dope. With Gafford they get a real Center and the Warriors can adjust their rotations a little bit more against big teams. Adding Ad will help them as well (if he is healthy). And I think it is worth giving up 1 FRP and a Swap. Getting rid of Jimmy (he will not play anymore) and adding AD even if he just plays 50% of the games that's 50% more than Jimmy, Kuminga and Buddy are playing under Coach Kerr.
The Picks aren't a real sacrifice, the Warriors will stay kind of legit as long as Curry plays Basketball and that's gonna be at least until 2028. So their rebuild will begin right about 2029 and then they have their picks
--- As the Warriors I'll make this trade immediately, as the Mavs probably too. The Kuminga gamble and the 2028 swap gamble is definitely worth it especially after Rich Paul demanded a trade for AD