Based on the premis that Tim Duncan and Manu are going to retire.
1. Make sure I bring back the following players. Simmons, Anderson, Mills, and Marjanovic. They will keep our bench productive.
2. Create enough cap space to go after Hassan Whiteside. He is young, and a player that can be very effective without the basketball, he would also be the perfect compliment to LaMarcus and Kawhi. Second choice is Ian Mahinmi Very similar player to Whiteside but at about half the cost.
3. I'd draft the best available player but specifically look at PG or 2 guard as my top priority.
4. I would NOT bring back the following players: Boris Diaw, Matt Bonner, David West, Andre Miller, and Kevin Martin. Time to move on from these old dudes and bring in some new blood.
I would quietly shop Parker around, if I had a taker I'd do it unless it was taking back a worse contract. If I don't find the right deal, it is no big deal to keep him and try again near the trade deadline. He still has a little bit left in him, but his expiring contract is very valuable to many teams.
This team needs a little more re-tooling and it will be ready to win championships again.