I do agree on this, obviously, but i wanted to make a full in depth guide displaying all different kinds of Kennen and all aspects involved.
I certainly focus mainly on the AP build, and the other texts won't be so extended, but I wanted to cover all for those who are interested and open for new ideas :)

As I stated in the ?? first sentence: haven't had a lot of time practising new builds, and this is also because I simply don't have IP for runes. but what I did find out was that kennen doesn't have a lot of health, so in that point of view he needs some boost. I chose warmogs for its health and health reg. Spirit visage is just a try-out really. Enhances the health reg from warmogs and force of nature.

Anyway thx for your comment I will try to get a more solid build. But its kinda hard cuz if u play kennen tank you won't get a lot of money, and tge itegms are expensive

Tank kennen is actually semi-viable, though he is outshined by quite a few other tank options. The chain-cc is really obnoxious, I just think he is better suited to a dps role and that is why it is frowned upon.

Thanks for the flame. Your comment is utterly useless and you made my guide get a bad start by voting down. Thanks a lot.

And before you hate: try Kennen. See how much you will die and what medium scores you will get, unless you really know the champion. And Yes Kennen is actually quite a smart tank since he can stun continuously. They will focus you because of your stun and therefore you are an auto-taunter ;) and with the right items you can easily withstand hits from enemies while you cast your ulti > stun > team comes in and kills. Kennen is a great initiater.

I've seen good tank kennens.
but why the hell warmogs & Spirit Visage?

remove the tank kennen, who the **** would play suck a thing.
Greater seal of defence?

Kennen has no mana, almost no cd's and 2 AoE spells for an easy farm, what you mean NOT easy.

Ye I understand xD
I just used the most obvious of all summoners for the tanky builds. Only tried them once so far. I accept all help on this part and I'm quite sure this is not the way. I will try to make this build a little more solid ;)
Anyway thanks for the feedback. Hopefully I have time for a little update this afternoon ^^

I don't recommend you allowing people to degrade themselves with heal :P In all fairness though, great guide!