"Don't blink... don't even blink! Blink and you're dead! They are fast, faster than you can believe! Don't turn your back, don't look away! And don't blink! Good Luck..."
I found u/Hogrid125's weeping angels gamemode (https://www.reddit.com/r/Overwatch/comments/bi1fki/i_made_my_version_of_weeping_angels/) but it didn't work (The code was outdated).
Simple solution: REMAKE IT FROM SCRATCH
So yea, I did that. 3 Meis vs 9 Mercys that freeze when seen. I didn't let them freeze each other because that would make the gamemode unplayable. Survive for 5 minutes, and the Meis win.****