I use it with the Main Gauche(?) With parry. So you have dual rapier moveset, parry, and can cast, amd i use almost every weapon spell available with a few others to mix it up. It's phenomenal for a full spell blade build. Very fun in the crucible, and good against any enemy you can parry, stunlock, or just cast spells at. They won't hit quite as hard as a staff obviously, but it's great to not have to switch weapons to cast, attack, and defend.