This is my second guide to these characters I have a Nidalee guide its attack damage, and this is my second one.My Kennen items are based on attack damage attack speed life steal and speed.Go check my profile and go check my Nidalee build if you bought Nidalee i promise its good.If you notice all my build contain damage.

The runes help for ability power instead of getting items like attack damage go near an enemy and attack and use your skills, kill enemy's if you go close to one then use skills again, it then it would die really fast also remember to stick with your teamates then its almost like your a carry Kennen although hes a ranged mage.

The masteries help for attack damage you might wanna get ability power but instead get attack damage to help items to deal more damage they would be scared of you.

The items help you to kill enemy's faster like crazy, to do that get attack speed attack damage
lifesteal speed and thats all.

get a big damage dealing skill to help lower enemy's hp if they have a potion, remember
Kennen has energy fast regeneration so use it again.

I recommend you get ghost and flash those are to help you to run for example when your legendary/godlike you cant let them get more gold.

All of these make a good combination you will get alot of kills try your hardest!

If your having a situations use lightning rush then flash and ghost to run away if your an expert at Kennen use flash lightning rush then wait for lightning rush to be done then use ghost to get away.If flash and lightning rush was enough then save your ghost for other situations.
if your really close use it in order like this flash lightning rush then ghost if your to close it works if your close to a ranged champion or a melee champion.

I recommend don't jungle you may want to but don't jungle when your lvl 12 if your gonna get baron don't do it at lvl 16 with a teammate if you have a tank on your team ask them to attack first cause they have lots of armor and health and attack.

If your teammate is being greedy and 1v2ing then ping it and tell him to back up
sometimes ask them to do all of them at 1 lane to push it really far and fast.

If you follow this build you would get a winning streak to 20 games like i heard someone do.
Other skills sometimes does not work out ask me on this build tell me what character cause i have mostly half of it i buy Riot Points ill put comment to vote ill check over this and over again so i would give you a big help.

This is how to farm, scare people away to make them unfed you would be lvl 5 and they would be lvl 2 if any one of your team forgets to stay to solo they would let the enemy farm so them they would be a higher lvl its a big disadvantage for a chance to win the game.