DAMNIT! Inconclusive! The only thing i got from that is that Athena can be beaten but Mercury is dead. I'm guessing that would mean that for now, the curse should be gone. I still feel like Venus didn't want us to fight that battle but will this in some way damage the relationship?
I struggled myself with this decision. At the end i decided to fight because Mercury is no more. Athena made a personified curse out of her, a Fury. She has no problem to kill Lumi in the name of her goddess.