If you use the "bulletin board" in Wolfs Den, where the Ranked Rewards NPC is you can create a premade group that can be used in CC if I understood it correctly.
I don't know how it works, just that you can from there.

And from how I read it, the group works lika a Deep Dungeon group, with fixed members.
I draw that conclusion since the board had details on how to disband a premade.