I'm dealing with a broody right this minute. I have had a devil of a time breaking her, and just gave up and decided to let her sit on three eggs. The problem is that the nest she's chosen is the most used of the seven nest boxes, and therefore very vulnerable.
My attempts to convince Su-su to accept another nest box all failed. She wasn't interested in the three eggs at all unless I put them in the nest she favored. So that's where she's going to spend the next week at least. I may then try to move her to the broody nest box which is on the floor in the least used coop, better for rearing babies. I'm hoping she will have imprinted on the eggs by then and will be willing to go where I put them.
So, my words to you are that it's not entirely your decision. Your broody, if you happen to get one to come into the right hormones, will select the nest, and if it's not the best choice, you may need to move her and the chicks when they hatch to a safer place. And even then, a broody may not cooperate.