I think Porzingis might be the way to go. Add to the frontcourt, and add a legit 3rd piece to the team that's still only 27.
Brogdon + Muscala + PP + Future Picks (including 2 FRPs - 1 unprotected, 1 protected)
White/Smart/Davison
Jaylen/White/Smart
Tatum/Gallinari/Hauser
Porzingis/Horford/Gallinari
Timelord/Griffin/Kornet
Then idk, maybe G-Will is re-signed as well, but if not whatever. I like that team and it's a lot more balanced. 37 year old Horford can come off the bench which I think bodes well for both him and the team going forward.