Why would we need help?
There is something wrong in your logic, when you assume that the PAF can operate from within Pakistani air space and dominate a much larger air space and land mass, but that the IAF has to penetrate Pakistani air space to do anything substantial. Does the IAF not have substantial stand off weaponry?r
At the level of airy-fairy nothings Pakistan does have a western front, which is not exactly passive at the moment. And China has been ratcheting up the tension on her maritime boundaries for some time now. the Philippines has caved in, Malaysia shows distinct signs of doing that, but there are still pockets of resistance. The USA, for instance.
These are for the sake of argument. Personally, I don't believe that the situation is bad enough to contemplate even Pakistan and China mounting joint operations, leave alone a larger multilateral outbreak of hostility.
To put things in your terms, we need to ask if the AIP subs will be so located as to be able to get some gains within the one week that you postulate (which is probably correct).
I'm afraid that the facts aren't on your side.
- The restrictions - the rigid restrictions - put on the IAF and the IA by the political leadership are well known. Even the Americans, approached by Nawaz Sharif in dire straits, knew all about them, and knew that he was facing a disastrous situation in spite of that.
- The weakness of the Pakistani side has been put before all of us very bluntly: after the initial period of display of mutual machismo, with radar locks on each other, the PAF reverted to combat air patrols and less and less of those due to shortages of spares. Please read Kaisar Tufail.
- In spite of everything, some fanboys make it a pointer of superiority or of domination to argue that the IAF never crossed the LOC. The fact is that it did so repeatedly and frequently, with no specific aggressive intent, because the LOC is a tortured, twisted line at most points. This is the case of the dog that did not bark at night. The PAF was on CAP but never reacted to these numberless breaches of the LOC. Work it out.
I personally feel that a shore-based missile defence, and a supplementary maritime patrol aircraft line with stand-off weapons is the best combination and the most that can be sensibly defended. If the hostilities don't last more than a week, what will the surface ships do, besides playing tom-fool games with the IN during peacetime?