A powerful build for this sword is:
Starting class Deprived
Rings: Ring of Favor +3, Life Ring +3, Chloranthy Ring +3, Prisoner's Chain.
Armor Iron Dragonslayer Set
Weapons: Refind Dark Sword, Dark hand
Did you know that you can actually combo R1R1R2R2?
Or R1R1R2L2(with dark hand)