Volibear

Wait to build any armor or magic resistance until you see if Volibear is going AP or AD build. If he builds AP you must play extremely safe and don't get caught by his Sky Splitter or he will run you down 100-0. It doesn't scale well so you will eventually start to beat him but it's turbo annoying.

Mordekaiser

Wave management is key to survive laning phase! Let the minions push and try to freeze it. If you let him freeze on you, you're a dead priestess.
Don't try to E him unless you know you are safe from getting ulted because your spirit will disappear in his realm. Leap of Faith has a small window to cancel Mordes ult if you time it perfectly but don't rely on this.

Ryze

Get on your knees and beg for your jungler to gank. Max Q and freeze the lane.

Quinn

Max Q first, play safe and be extra careful to ping when she is post 6 and missing from lane. Your teammates will int her.

Yorick

Illaoi's low mobility makes Mourning Mist hard to dodge and they will prevent you from getting your CS or touching him. Even if you land E, he can wall you and let his Maiden drain you of HP while he shoves lane.

Cassiopeia

Fiora

Try to land Q's on her since landing E is impossible when her riposte is up.

Wukong

Don't get jebaited by pulling wukong's clone spirit rather than Wukong himself.

Garen

He can dive you with a Q flash E R combo before you are able to retaliate by pulling his spirit and ulting.

Trundle

Kayle

Gwen

Sett

You technically counter him but he can still be annoying to deal with, try to make sure he doesn't walk behind you to ult you away from your tentacles. You can cc yourself with R to stop him if you time it perfect.

Kennen