Kennen is a really understimated champion,If you get the hang of playing kennen and you use all of his skills correctly trust me they will cry for their moms,he can be hard to play but trust me its worth it the pwnage is to awesome

Well the reason i picked these runes is cause i like the extra ability power to get an extra pwnage start so i can rape from the begining til they realise who they are messing with and give up after alot of pwnage,and of course magic penetration so i can screw their stupid resistance,and the ability power per lvl cause we all know we will reach lvl 18 and pwn their stupid faces

9 in offensive so i get magic penetration and the reduce of cooldown and 21 in defensive so i can go and pentakill them and not get raped while doing so =)

well start with dorans shield then you get the hextech revolver for the spell vamp then you can get the starting boots and then finish revolver to will of ancients then you finish the boots to sorcers shoes and after that you got pretty nice spell vamp and ap and one more thing SERIOSLY IMPORTANT! you need the hats to pwn those stupid noobs in the face i usually get like 3-4 hats cause i rape so hard with my runes and all so trust me the hats equal RAPE!

Pros

kennen is really underestimated champion so they probably wont see you as that big of a threat and when they do that you know that you do? PWN THEIR STUPID FACES!
Kennen is a really good farmer and can get in and out of fights easy
But dont get out just pwn the noobs!

Cons

Can be difficult to skillshot with q and land the stun but really.
Who are we kidding? we will pwn anyways

With this build you can get alot of kills.It gives you a really nice burst dmg and well if you go with this build you can surely Pwn.

i have tried others build with like all rylai scepter or whatever its callaed and abyssal and hourglass but for me it didnt really work out that well with kennen so this build i have now gives me really nice burst so i can run in with my skill E on all of them then i press R and ulti them and then W and you probably get a tripple kill at least but trust me pentakill to thanks to the nice burst dmg you will rape som faces. the only downside is they surrender before you can really rape =/

Kennen is really awesome to creep farm with especially when you get needlessly large road
you just use your E run through all of the creeps then press W and you get alot of farm like that and you can buy hats earlier and show the enemies true pwnage

When you use Kennen with this build you can support your team real nice you can carry the whole team with kennen which many people dont mention.His the main focus of the team with this build you probably do the most dmg so when your team is getting attacked you rush in with E and press R and then W and fk them up then you and your team clean them all up

I use ignite and flash for this reason.

I use flash mostly for early game so i can have more chance of survivebility and get out of ganks or flash in to get kills if i dont have time

I Use ignite mostly for firstblood in the begining they usually get away with low hp so i use ignite for that purpose.When they try to run i ignite and pwn them.Thats the reason to why i use flash and ignite together to sometimes when they run way to fast you flash and ignite and get the kill with these summoner spells you got a big shot at getting the kill secured

Well i pretty much do the same thing in ranked but with kennen its usually best to go mid with him cause you can get of situations pretty easy.And thanks to the E ability you can go in attack and get out but in ranked you just try to mostly last hit and harass with Q,W and then when he is a little more low health you run in with E throw Q then W he is stunned you ignite then Q again and all you know and he is pwned