If you believe only economic interests dictate the way two entities interact on global scale and by extension India's evolving economic profile will somehow enable it to coax states to turn their backs on a third country then I'd have to say your understanding of how foreign-relations is very naive to say the least.
The most India can accomplish is to create some inconveniences for Pakistan, speaking holistically. But to suggest that it can, by some way, isolate Pakistan is simply absurd. I repeat you can employ every trick you have up your sleeve, execute every stratagem yet you'll never be able to diminish Pakistan's relevancy, let alone isolate it. And trust me when I say this isn't my nationalism speaking, this is based of empirical facts.
Besides, Pakistan maintains an array of relationships with a number of countries that go way beyond economic or geo-political interests. These are deep-rooted, people-to-people cultural and religious bonds that stretch back decades and in some cases centuries. Turkey, China, KSA, Gulf, and Iran to quote a few. If Indian establishment believes their emerging status as a major economy can undo these bonds, they do so at their own peril.
