Scoring an entry very low is like kneading bread twice as long as needed believing it will make the bread lighter. When in actuality it does the opposite.
What I’ve seen is when the entrant receives a pretty low score and lots of comments on how so much is wrong, they ignore all the hard work of the judge and toss it away. I know if she makes around 70 and the judge concentrates on the major errors, she’ll be more apt to take the comments to heart. It would be unlikely that her manuscript would final anyway. If the unlikely did happen, that would mean the other two judges loved it and gave it a 90 or higher and didn’t see what you did. As we all know, judging is so subjective.
Just my opinion.