Trade the tenth pick to Atlanta for their 17th and 18th picks. Draft two bigs in that range. Both Rudy Gobert and Gorgui Dieng are available according to nbadraft.net's mock draft. You then start training camp with an open competition. Let the best 7 footer win!
Then sign Josh Smith as a free agent and play him at small forward. Then move Nic Batum to shooting guard.
You have doubled your chances of finding your defensive minded center and added depth and a young, athletic defensive minded shooting guard from your own roster!
Now just think of the length of that roster. One center has a 7'9 wingspan and 9'7 reach and another center has a 7'4 wingspan and 9'4 reach. You add them to an existing center with a 7'3 wingspan. Your power forward has a 7'5 wingspan. Your small forward has a 7 foot wingspan and 40 inch max vert. Your shooting guard has a 7'1 wingspan and your point guard has a 6'8 wingspan and 40 inch max vert.
That has to be the longest roster ever created. You will create mismatches against every team you play. Yes your dribble drive offense will suffer but your passing game will excel with assist averages of 6.5 from Damian, 5 assists from Batum, 4 assists from J Smith, 2.5 assists from LA, and 2 assists from Dieng. That's 20 assists per game from your starting five. Last season the highest rate of total team assists was 19 by the spurs.
That's also 7 blocks per game by your starting five. The team leading number last season was 6.9 blocks.
I know it's presuming Dieng's college numbers translate but I'm not even taking into account Leonard's and Gobert's numbers. I'm also not taking into account the bench's numbers.
You have to admit that is one long, athletic, ball sharing and shot blocking roster.