^ Not gonna happen, consider the size of their army. ONLY IF, two or separate groups emerges in armed forces itself, there may be civil war but partition won't happen. And that won't be good for us either.
The best thing for India is current state of Pakistan. Too busy at western front, massive internal threats, dwindling economy,slow economic growth, growing Indian presence in Afghanistan, major projects being delayed, rising debts and situation of default etc. .
Neither developing Pakistan nor failing Pakistan is good for us. If current state remains same, India can take significant lead.