Quick guide

Flat Ap runes

Item orded may vary depending on enemy team

If you are not an teleport fan you may pick something else

Defensive masteries because you will be focused

For new players mejais is not recommender

The old way of playing kat as much as you figured
MID

Flat ap runes

After the ap buff it is more worth of getting it

Gives you a nice advanted against your laning oppenent, the shield keeps your health up, or teleport if you need to go home for a quick item or heal.

Sorc. boots for being more awesome

21/8/1

Going ap in offensive tree
Taking the defensive skills so you don't get killed so easily because you ARE a glass cannon
1 utility to improve tele and flash

Staring with a shield gives you health and hp regen, making you not so squishy and keeping that health up

If you play good you should be able to buy at least item or too, boots, tome or both, or even a mejai, the blades and ult makes sure you always get assists or kills, at least giving you a sure assist and granting a stack to your mejais

The rylais scepter slows down enemies, making them stay in that ult for a longer time + giving you more health and ap to you

Deathcap for awesome ap increast, it is a must for every ap after all

Now it is YOUR pick, you can go either way, at this point you can SELL your shield and start getting money for next item, lich bane makes you extra awesome damge, special good for pushing TURRETS or wota for survival

R>Q>E>W

Bouncing blades, just spam it to get minion kills and harass, because you have to harass to win

Shunpo, an awesome skill, you can wither be agressive or defensive with it, if you have a lot more health then your opponent and you are confident of yourself be agressive if not use it to retreat

Killer instincts- either with Bouncing blades for extra damage and heal reduce or with shunpo for an awesome jump in the center of the fight to ult

Lotus ****ing awesome skill to ruin some faces...
Use it wisely when your opponents stuns are down

I am going with flash tele

I recommend flash as a must

You can pick something you want instead of teleport (I am simply a teleport fanatic - teleport jump in and ult, walk away with your head up)

You should have the basic knowledge to be get going

DON'T expect to do fine at first time

Practice makes perfect

Go on spread the old fashion way, have fun