AD Kennen = Herp Derp -1

Just made a change, I've found that another Phantom Dancer helps a lot more than the Last Whisper I had before

Because for this build, making your physical attack is a higher priority than increasing your skills' power by the same amount

Why don't you swap lastwhisper and nashor ?

More AS, and you won't benefit enough from the 25% CDR of Nashor if you get it at last, not to mention %ArPen is really usefull against tanks when they have stuff, what means mid/late game.

Also, the little AP boost will be really usefull for lvl 1-3 skills (it's bette rto add 15-20 damage to your ult when it does 80 damage than when it hits at 210, and so is for the Rush)

Fair enough :)
Here's you +1.

Because most of the people I know really just look at the item build and ignore the rest, so I figured I'd show that part at least while i write the description.

"Here is me posting my awesomely beast Kennen build, I will post the strategy to playing him later when I have time to write it."

Why didn't you just safe it as a draft and wait?