If your sure you can get back in the crate before they are up and about in the morning and picking on her again. Can you put the whole crate in the coop?
Actually 7 Biddies idea is the start of the plan used to try to reset the pecking order. If you have the space, two separate pens. take the lowest on the order and separate her and the picked on one. Each week introduce the next lowest into the picked on one's pen. By the time you get to the problem birds the lower ones have formed a new order and hopefully the bully bird has their hands full trying to fit in that they can't bully. That's the theory anyway.
Actually 7 Biddies idea is the start of the plan used to try to reset the pecking order. If you have the space, two separate pens. take the lowest on the order and separate her and the picked on one. Each week introduce the next lowest into the picked on one's pen. By the time you get to the problem birds the lower ones have formed a new order and hopefully the bully bird has their hands full trying to fit in that they can't bully. That's the theory anyway.