Both pg's can have a major impact if put in the right situation, with the right line up. Sasha and calderon can work well together, and galloway and grant seem like the work well together.
I think giving the experience, you would prefer to start calderone and affalo, it's easier for 2 young guys to come off the bench with energy and a quicker pace. Sasha is a wild card if affalo or galloway are having off night, or you wanna play small ball, he's your sniper, your fill in.