The Warden Twinblades might be my favorite weapons. They are quick, have a simple move set with a decent weapon art that you can easily combo and put that bleed effect on easily. As far as I've tested the best way to utilize these bad boys is to make a Luck build, hollow infuse them and apply carthus rouge. Bleed out opponents. Hollow infusion scales with luck, bleed effect increases with luck, carthus rouge tops it off. Have anri straight sword on the side if you happen to need a good out if put in a bind cuz that scales with luck as well.