Looks like you are looking for thoughts so here are mine:
8.5 is too low for me to play an under in this situation but if you put a gun to my head and made me play the total, I would play under. Prokopec and Dessens are both solid. Cincy has their two key bullpen guys, Sullivan and Graves, relatively rested (neither pitched last night) and Nichting is available, too. Shaw is fully rested on the other side and really only the marginal guys were used in mop up duty yesterday. Cincy's lineup is very, very hot, which is why I played them, but getting 9 runs or more from these two against two solid starters and key guys rested in the pens may be a tough proposition.