Before you say anything, just give it a try. Buy Tear of the Goddess ASAP and spam that Q! Once you get Iceborn Gauntlet, you will be able to harass your enemy laner with ease (with the help of your passive). With this amount of CDR, you will be able to use your Lunge (Q) everyone 4.8 seconds (around 2 seconds if it hits a target) making it near impossible for you enemies to escape from you. In a successful game, you should end up with 40% CDR, around 75% physical damage reduction and almost 400 AD (excluding Baron).