He could expire on them at the end of next season if he uses his option.
How many/which picks?
We could offer 2 late firsts (DAL 2016, BOS 2016) and the 2016 BKN pick, as well as a 20.1 million trade exception for Blake. Given that the cap is estimated to be 90 million next season, that could leave us with:
IT / Smart / Rozier
Bradley / Turner / Hunter
Crowder / Jerebko / Young
Griffin / Sully / Mickey
Johnson / KO / vet min. or 2nd rounder
Basically let Sully test RFA to find out his worth, and then sign some combination of Sully/Turner/Zeller with the remaining 18.3 million (we could also give up on Young if we feel it's time and free up an additional 1.8 million). Or LA could ask for some combination of players and picks, which would give us plenty of cap space. This is just the minimum I'd give up, if LA wanted to negotiate, I'm willing to give up more.
Bottom line is, we have pretty good flexibility when it comes to adding a max player and basically retaining our entire roster (minus Lee, and possibly Zeller/Young). Whether it's a trade or a signing, make it happen!