The issue is, there is no sort of advantage India could gain that could tilt the negotiating odds in its favor that would not induce panic in Pakistan. Pakistan's own General Staff has already signalled as much, given that they're delegating nuclear firing authority to corps-level commanders in the event of a general conflict. Ergo, the logic of CSD is self-defeating. That's what I've been trying to say for the past 20 pages, but it still seems some commenters believe they can have the cake of an "advantageous negotiating position" and eat the cake of "keeping the conflict non-nuclear". They can't. You either go heavy, or not at all.
Is India willing to risk nuclear war to punish Pakistan for a terrorist attack? That's the question India's policymakers need to answer.