What is Raiden's best team at "dolphin" (C2 5* supports) investment?

I've been using C3R1 Raiden/C6 Sara+Elegy/C6 Bennett+Mistsplitter/C2R1 Xilonen for the past year. I preferred to use Xilonen over Chevreuse because of the fast rotations and easy energy refund which makes overkilling less of an issue.

However, I recently got C2 Durin and I'm wondering if he's worth using over Bennett in this team or subbing both Bennett/Xilonen for him and C6 Chev? I also have C2 Furina if that changes anything.