Gear used in build: Fire witch helm, silver knight chest, gauntlets, and leggings.
Weapons used: Refined Gotthard Twinswords +10, Saint's Talisman +10, and simple cestus +9( Cestus for regenerating Fp, and for parries).
Rings Used: Priestess Ring ( to cast sacred oath), Cloranthy Ring, Ring of favor and protection, and Hornets Ring (for parries), or Ring of steel protection.
Spells Used: Lightning Blade, Sacred Oath, (optional: Tears of Denial)
This build is very efficient in both PVP and PVE, It slices and dices to make mincemeat of all your foes. With this build you want to buff with lightning blade and Sacred oath before a boss or PVP battle. You can use the weapon art of the Gotthard twinsword's weapon art to great effect if you combo correctly.
If you are not very good at parrying switch the Cestus for a grass crest shield.
If you want to you can take off the priestess ring after you buff and replace it with something else.