Couldn't help but notice kiwdahc's comment.. Doing that, and especially without creditting ignaxios, is just wrong..
Also, this falls more under the template category.. No real explanation regarding alternative choices, and the singular linear itempath.. Not to mention that Kennen with this build will be extremely squishy (more than he normally is), you even mention his squishiness as a con, but only thing done towards negatting it is picking up Glyphs of Vitality - which nets you 500 or so hp towards end game..

Needs work, nothing personal though, look it over :p

you literally copy and pasted half of ego ignaxios guide from solo mid which is a copyrighted site. For that reasoning am downvoting