shes a amazing Kite champion, shes not about burst, shes about gorilla war fair. Sure when you are super ahead you can one shot people, but the same can be said for any champion. What you want to do with ori is realize unless your opponent is a idiot you wll rarely solo kill in the first 6 levels. So what you do instead is you buy items that can help you sustain in mana like tear, or rod of ages, or athenes and that way you can safe farm and wait for the late game. You want to kite with Q W E back to you while moveing around to proc your passive. Shes a Kiter, not a burst mage. She excels however at makeing tanks even stronger by putting the shield on them and ulting the moment the tank is in range of about two/three people.
Add me if you have any more questions
PhanatosG2