We handle many applicants to ISB every year and honestly don't worry about higher quant and lower verbal score. Thats the case with 90% ISB applicants.
Also, its hard to comment whether 710 is good enough for ISB as it is just one of the parameters.
Since you have time, you can retake GMAT if you feel that you can improve your verbal score and hence the overall GMAT. That will help in any case.
Feel free to contact us for any clarifications.
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