Hi mhasson33,
Given that your overall score is still competitive at top-10 schools, I don't think the optional essay is mandatory for you. Let your resume and your transcript speak for your quant abilities. While having a recommender cite that you are analytically strong is a good move, I advise you to get it from a professional reference, as adcoms usually prefer you not use an academic reference.
Best of luck,
Daniel Richards
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