Swap one of the phantom dancers for an Infinity Edge (i'm new and dunno how to link items :P) your build would have 90% crit chance and thats why too much, my build consists of (Statikk Shiv, Infinity Edge, Phantom Dancer, Blood Thirster, Ravenous Hydra and Zhonyas Hourglass) the 75% crit chance is enough for the crits and the crits hit champs with low armour and health like Ashe and Lux like a truck, one time i even one shot a Lux with my Paaarley.