When Adcoms say all parameters of the profile are equally important, they are actually telling the truth.
But this generic statement has lot of exceptions and adcoms have to dig down into all the factors.
A good gmat can compensate lower GPA and good leadership work outside workspace can do the same for the average workex.
No single factor is important for the admission, but it could be for the ding.
Eg.
If essays are poorly written, no matter how many accompanishments you have, you will be dinged.
If essays are superb and interesting, and you show how well you fit into Why MBA, why This school, why now questions then 20-30 gmat difference won't ding you.
If essays are superb and accompanishments are great but your recommendor wrote out of the box and did not highlight good points about you or the LOR is not in sync with the applications, the chances are very high you will get dinged.
Diversity is also an important consideration. You can not expect adcoms to admit you when they already have 20 similar profiles and some of the key factors for other profiles are better than yours. Adcoms have responsibility to create a diversified class and it is a rule of the game. So I will not argue or show anger if adcom ding me for being an Indian IT Male. Yes I m at dis advantage but it does not mean I do not have chances. My first step should be to compete against my fellow Indians and try to portrait how well I fit into the school and how different myprofile is from the others.
If you can not differentiate on professional attributes, you can do so on personal qualities.
So basically our strategy should be to look into the options that can improve our chances.
Gmat, Essays, Extra curricular activities, and recommendations are some of the parameters that we can improve now. So if you are from an overly representated profile, look into the options that can improve your chances.
I strongly believe if the Gmat is in a respectable range, then scoring 20-30 more will not guarantee the admission.
Eg 700 is a good base point for all schools, so if you are dinged with 700 gmat, then having 750 will not let you in. You must dig deeper into the application to analyze what went wrong and how to reduce the odds.