Okay. Don't nerf her but make her comic be more serious. Make her acknowledge that she has the powers of a god.
Explore weird concepts like making her brutally kill criminals and then bringing them back to life so they get a view of what awaits them in the afterlife. Or go back to old infamous mindwipes and explore its morality.
I want her to explore everything that a normal hero bound by rules of law and morality can't do. Really walk the line between good and evil.
All that it requires is to make her take her powers seriously. Stop with the dumb foreplay of fighting enemies with punches, kicks and magic lasers. End it at the beginning with a single word. Find out what made these criminals commit the crime. Was it poverty and hunger or was it just plain greed.
Or make her tackle institutions that are guarded by the law but are making everything difficult for the common man. Superman and Batman rely on physical intimidation. Make Zee try mind control and its consequences. Like making a corrupt politician donate his wealth to charity is wrong but is it really wrong when he has gathered that wealth through corruption.
Topics like this provide a better challenge to people with powers like Zatanna.
Flash once said Zatanna made volcanic lava turn into a field of flowers. Powers like that make superman feel small. Explore the consequence of displaying such power to the world. Reality warpers look good only when they do it on a large scale.