A hard reality is not even a 100 percentile can guarantee you a seat. A lot, precisely around 40% weightage is given to the performance in WAT and PI. To get a call you need to score anything above 99. All the best.

Hey 

It seems like you have a good track record of academics and that's a plus point when you aim for IIMS like IIM Ahemdabad , Bangalore and calcutta . However your CAT score matters the most in your selection therefore try achieving a good CAT score like above 90-95 percentile and for sure you'll get a seat