The next India Pak war we treat it as a conventional war but aggressively capture territory, Karachi and Lahore must fall within one week, Troops on the ground clearing Sindh and POK by week two. I'm sure Ray and lemontree will laugh at me for writing down timelines but willing to take those chances. between week one and two one of two things will happen.
1) Pukes will go nuclear, we respond by taking out pindi and islamabad and shut down their installations with massive air power.
2) Pak will surrender, but we have to accept those clauses based on denuking them.
Splitting Pak later is a consequence of either outcome, We sign a UN recognized pact with Balochistan saying our army will be present there for three to five years to clear out any more resistance and form a local administration there. They will be happy to oblige. Kashmir is reaneexed, there will be Chinese casualties in GB if they are armed and fight us.
The headaches will be as to what to do with Sindh and Punjab. I would suggest an internal refurrendem between the two about staying together or splitting. If either chooses split, then with the help of UN, it becomes Sindhudesh and Punjab.
Longer term visions include Pashtunistan by merging with Northern Afghanistan if the rest of the Afghans agree, Taliban issue might get resolved too.
This is how it should pan out, anything less is a problem.