When buff runs out, menu swap to an elemental Murakumo/Washing Pole. The giant skeletons drop them, or kill Shiva in the other NG+. I couldn't get you a shield but to use you'll have to sacrifice Vit.
You're neglecting scaling stats to buff faith when it won't really have much of an effect in PvP, in my opinion. You're not exactly Vit. gouged either, which is the main benefit to wielding an elemental weapon. Sure, you'll be able to kill people quite effectively, but the build isn't doing all it can be either.
Replaced Murakumo W/ Claymore (50 less damage better move set.) Replaced Black Knight Shield w/ Caduceus kite shield 2 less stability but a lot lighter. Replaced Sorceror Gauntlets for Stone Gauntlets New poise is now 79