Hello, I'm vBalazs94, and i really don't want to take it long, you probably did not come here to read a novel. Btw, sorry for my bad english. :)
Oh yep, and something more, you won't see any coloured or photoshop made borders and stuff, i just don't care about these ****.

Well, this is a totally useless chapter in my opinion, but will tell some.

The pros are quite simple.
-high range
-2 cc abilities
-aoe dmg
-easy farming with passive
-you are a robot

The cons:
-squishy
-4/3 is skillshot

While you fight with someone, or the whole team, keep in mind, that you ALWAYS SHOULD put your ball on somebody who engages, and goes into the enemies.
Always try to be as far as you can from the fight, and keep ballin' them.
Short and easy.

Runes are common ap carry runes, but taking armor instead of mana regen will defend you from early jungler ganks.

Well, some of you may ask: Why not flash?
Easy. Orianna do not need flash with this build because we build enough defense early, so our W and E will be enough.
Teleport will help you with gaining xp and gold, and later will be nice for ganking.
Ignite is just simply cool.

This is not a guide for totally new players to Orianna, but can be userful for players who can not decide what to build, or how to play successfully with Ori.
Have Fun. :)