The impression I got was that, a lot of the stuff she was doing in the final battle? Was using her own divine power to redirect and control energies launched at her, by Ares. She probably can't throw lightning bolts of her own, but if you send tons of divine power at her, she can fling it back. This fits with her general divine specialty being "defense". Which, btw, I don't actually think the deflection is artifact-based. She did the crossed-bracers trick before she "borrowed" the artifact armor. I suspect that she can use any suitable object to perform her supernatural parries.