This build is for mid/late game. You wont loose if you moved well in fight. It's all about your position.
I'm gonna explain you the way for win your game at every moments.
This guide is for toplane and ad carry, if you pick it for top its like have a jayce or somethin like that you will be a bit tanky not much but enought and you will do great damage on auto attacks.
You can be counter by hard poke Champ but u can dodge it just try to poke more and keep farm.
For play this build you have to be skill a bit just need to hit and run and always in movement.

In early game you are really weak you have like 65 ad so dont be aggressive, just get some farm and wait mid for be offensive. When you have like 1400 gold back and buy your avarice blade and your berserker's greaves. Go back to your lane and keep farm the only one trick i can told you is : Keep farm never attack them
Kennen ad is like caitlynn for passive you know, so when you have your 5th hit try to hit the ennemi and then push your w.
If you have a support with high heal you can poke them as much as you can but keep safe dont fight.
when you can buy your statik recall and buy it ! after you will farm easier and easy deny them. If the jungler gank you, easy escape by e or stun him.