Don't retake. A retake is only useful if you can *substantially* improve your score. Even, say, a 172 would fall short of what would be expected on a retake, given your original score. There are two reasons for that: First, your score is read not as a single number, but as a statistical band which includes at least one number higher and lower than your reported score. Thus, the low edge of the band for a subsequent score must be higher than the high edge of the band for your current score in order for an admissions officer to view it as improved, even slightly. Second, scores tend to rise on subsequent LSAT's, so any improvement equal to or less than the expected improvement would be viewed as "gaming" the system and not actual improvement.
No admissions office (of a good school, anyway) has set knockout numbers, and all are aware that test numbers fluctuate somewhat depending on personal factors and test conditions. Your very high GPA, combined with a score that is within the admit numbers nearly everywhere should be sufficient to get you into some top fourteen schools.
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