Main, 3*Kakashi, 3*Sasuke, Hinata should get you 10 combo but since I haven't played as SB I'm not sure how the chain goes. But I'm pretty sure with the right summon it'll chain anyway.
EDIT: Ah fishcakes, I forgot summons are a lvl 5x feature. Gillingham's chain should work. This post was last edited by Kaede at 2017-2-11 22:25