For the staff: Porcello, Price, Rodriguez and Buchholz are probably your 4 starters
Pomeranz goes to the pen
Kimbrel, Uehara and Ziegler are locks ... that leaves 3 pitchers if you want an 11 man staff (my preference), 4 if you want 12.
Now personally, I would be content with zero LOOGYs, as neither Abad nor Scott has proven enough to say they deserve one of the three spots.
Kelly has been outstanding since coming back, and he can get 6 outs at a time as needed, so he is one of the choices for me.
Hembree has dominated righties all season and he also can stretch out as needed
The question for 1 spot to me is Barnes v Tazawa v Scott/Abad ... I don't know if I trust Scott on such a small amount of data to be able to get a lefty when it matters. Abad has been shaky but has a better track record. With the other pitchers you have the luxury to go with a 3 out guy here. Tazawa has looked good recently and has been well rested, and I cannot get behind Barnes still.
So I'd go Kimbrel-Uehara-Ziegler-Kelly-Hembree-Tazawa + Pomeranz as my pen.
The best thing I can say is that it's a really hard decision - and that is a compliment I never expected to utter.