The purpose of this build is to rush armor penetration before you get the big damage, of course having no armor results in teh end that you don't survive long in teamfights when youre targeted first. But You depend on your ultimate to get 40% damage reduction. so pretty much this evens out the fact that you get killed easy. But i'll tell you that. at the end of the game, youre ''q'' does 1000+ ad dmg. ( you have it every 3.01 secs ) lets just say thats you dont need armor xD

I suggest to evolve ''taste their fear '' at lvl 6
then '' Leap ''
And then your ultimate.

I choose to evolve the ult last since you dont really need the armor in early game and having leap + taste their fear evolve makes you scary. VERY scary.