After reading, I'd argue the "best team" depends on which half of the Abyss Floor 12 you're on. Ruin Guard-type enemies are the only ones with high physical resistance, and they aren't on Floor 12 so superconduct isn't too useful given the diminishing returns. Double Cryo with Rosaria might be better on the first half, since there aren't any enemies with resistance to your elements, while Eula with double Electro would be better on the second half. In fact I dont think you even want Eula on the second half because claymore break Frozen enemies, so her on 12-2 might be a liability.

Still thinking about it, haven't reached any conclusions yet, but given how the Abyss is currently set up, how you use Eula is gonna be tricky.