The broody breaker is not for fixing "birds not laying in nest" issues like you have.
For your issue, this is what I do, which some others have confirmed worked for them as well:
Now this isn't practical if you don't have time to stalk them, but what I did was I learned the problem bird(s)...
If you already have bullying issues, don't add more to the mix.
Since you mentioned she's broody, do you want her to hatch? If the answer is no, you could try killing 2 birds with 1 stone and put her in a broody breaker to 1) break her broodiness and 2) shake up her spot in the pecking order...