As I was saying in the last thread, if Zee actually turned evil she could easily take out four of the other five girls. She'd have all her magic and none of her inhibitions.
Karen and Barbara are tech users. Kara and Diana are bruisers. Both types are susceptible to magic and reality warping from someone like Zee. She could take them all out in one go.
The only one of the main team that would stand a chance against her is Jess. Lantern rings are such advanced tech they're essentially magic, and Jess has an upper limit of power similar to Zee. Faust herself called her the most powerful girl. Jess could theoretically counter and muzzle Zee, preventing her from casting.