I´m working currently on something and dont got so much time . I will keep working on this guide when i have more space .I hope it can help you a little bit , as said its not done yet! . (And sorry my english is not the best)

Pros:

*Lane bully - use this to your advantage and you can harass many opponents easily by watching your passive marks and striking with W. Your early game is very strong - be sure to abuse this and you can snowball easily afterwards.

*Very safe - Kennen's E (Lightning Rush) is a great dash/escape tool/engage.

*Very powerful ult - can completely change teamfights if played correctly.



Cons:

*Squishy - you're easy to burst down. Screw up your ult and you'll find yourself at quite the predicament.

*If not fed by the mid game you can feel weak. You might feel like your ult engage is all you can provide for your team (not that it's a bad thing, but it's better to get fed earlier on).

*Farming in the early levels might take practice. Kennen's auto attacks may take some getting used to but this is solved by the mid game where you can use E through minion waves and clear them up with W.

You want to be a lane bully early on and try to snowball off from there. Practice playing around with your passive and do your best to build up damage on your opponents. Always time your ult correctly, and you might even surprise yourself as to how powerful Kennen can become. E + Flash + ult engages can be amazing!

A good Kennen player can be very punishing to his opponents, so I hope you enjoy our little ninja friend!