A build that I created for PVP
1-2 katanas preferably the uchigatana to get good scaling and damage,and any lightweight weapons as well as a reliable chime.
Anything that will not go above 25 or 50 weight flyns ring.ring of blades+2,thunder clutch ring. And either the cholorinthy ring+2,southern ritual band+2,or the third dragon ring.
Many different types can work however sunlight blade is mandatory to inflict extra damage with faith scaling(as your weapon will do lightning damage). I also advise running either a healing miracle or great magic barrier( or both if using ritual ring) also if running ritual ring the last slot is up to you.
If you think its worth it you can try and use dex great swords or straight swords just remember you need to be under 25 weight to get the best damage from flyns ring (dlc ring) if you do not have the dlc use any ring found suitable. Also if you have it wear the saints hood as will increase spell uses.