Let me take a look at my options (Strong, Normal, Weak) based on playoffs average:
Spurs: Manu Ginobili, Kawhi Leonard, Tiago Splitter, Boris Diaw, Danny Green, Patty Mills
Thunder: Caron Butler, Kendrick Perkins, Steven Adams, Derek Fisher
And here are my remaining picks from the East:
Heat: Chris Bosh, Ray Allen, Mario Chalmers, Chris Andersen
If I were to avoid weak picks in the Finals assuming seven games, then I can afford to take one Spur now. Of all remaining Thunder players, Butler averages 11 PRA in this series, Perkins 10, Adams 13, Fisher 10. I can take a Thunder now, but anyone will just be lesser pick than Diaw or Green in the Finals. So it definitely should be a Spur. Now, I can pick Diaw or Green but it really doesn't matter because I can switch those two with Ginobili and Kawhi. Besides, just in case Thunder wins the next two, then at least I have already picked these two players. Since Ginobili has foot problems, I am going to pick Kawhi Leonard.
As for any Thunder left for a possible Finals appearance, I think any chance of salvaging that has already passed. So right now, a Spur win in Game 5 at home should give me a sigh of relief. If they do, Steven Adams gets my Game 6 pick. Otherwise, it's a healthy Ginobili or Tiago Splitter. If there is a Game 7, I got soon-to-be free agent Caron Butler.
Good luck with your picks!