In my perception, It is a close fight. why not go for GMAT again because ISB take best one and you have atleast 3-4 months in hand.
I have taken GMAT 3 times with scores 590->620->660
Do u suggest i take GMAT again to apply for ISB?
Will taking GMAT 4 time sbe perceived negatively by BSchools in Us/India/Asia?