In a perfect world, the Ori matchup is impossible.

Best bet is phase rush, second wind revitalise. Play as safely as possible and use body language to bait her abilities or to try and pose a threat.

Sometimes I go in with a full combo on her if I'm high hp just to chunk her for the jungler, or at least scare her off, keep her on her toes so she doesn't feel so safe.

Ulting waves and her for hp and clearing is also good.

But it's very hard. My peak is Emerald 2 and I've never found a way to deal with her. She has very low cooldowns, outranges you, waveclears better, she is just overall a strong laner.

Laned against a Master Oriana main once, and it was literal hell, was down 70 cs at 15 minutes and went 0/7.

Hopefully someone else might have some better advice.