Rank? Duped 5* Proxima vs. Unduped 6* Proxima

Spidey0486

I have Corvus and Nebula at R3. Question - should I R2 Unduped Proxima (have a rank up gem) or R5 my duped 5* (with resources) or is she not worth it either way?

odishika123

Duped 5 star