How do you plan to defang their nukes?
Good question
1st we need to deploy high number of ABM and Point/Air defence systems.
SpyDer, Barak-8, Maitri, Akash MK1,2 in large numbers by 2016.
(Most likely we will have) - These can tackle Cruise Missile, UAV, all types of Aircraft.
We already have S-300 and we should Buy S-400/Arrow-2 too around 20 batteries + Speed-up AAD/PDV project by 2015 and deploy in large numbers
(it's again Possible and might happen too) [These can destroy Ballistic Missiles]
We can have 2 layer of ABM/Point defence in major cities/asset (Israel model - Arrow + Iron Dome) - Possible.
Now, 1st of all I don't think Pakistan will use Nuke as their 80% Industries/population are in 200 Km range. Our 300 Brahmos can destroy all militray instalment within an hour whereas most of our important strategic assets are more than 500-1,000 Km away. (they can't do anything except launching Ballistic Missile). Pakistan only have around 50-60 such BM. Not to forget we will have 2 layer of ABM to detect and destroy such missiles. I do know, It's never 100% accurate. But Let us consider worst case scenario,
Only we able to destroy 80% such Missiles that 80% Missiles will fall in Pakistan itself and will turn her into Stone age. In addition, For 20% destruction, we can destroy whole Pakistan and they don't have even anything to stop. So, Even in 80% probability, Pakistan will be destroyed completely in 1 day.
Before moving our army in GB, 1st we will do massive surgical attack in 100-150 important Pak assets including Nuke plant. They can't stop !! Reason -- We can launch such attack from within our area as most of Pak assets are in 200 Km range. Brahmos/Prahar + MKI with Brahmos + K-100 will be deadly. Once, Most of the assets are destroyed, We will march ahead. What Pakistan will do in that case ?? Everything will be tracked by Spy Satellite Risat-1,2. Their may be some retaliation but our Huge defence will be ready to face such attack and get excuse to destroy them completely.