Its identical to one of the builds I use. I frequently kill players way higher level than me with it. And yeah, I do use Crystal +5, because I can roll-swap repair it after a fight. And backstab/riposte doesn't lower the durability. And the crossbow is an absolute GOD SEND if you are fishing for parries. I can swap the crossbow out quickly for a shield and parry that predictable running attack and stuff them in the face with a large club.