Pakistan have the same problem we have in Sweden with the Russian.
Both Sweden and Pakistan is neighboring a giant and hostile country (India to Pakistan, Russia to Sweden) while both have decent forces, both sweden and pakistan cannot defend their soil from the proposed threat land by land, foot by foot.
There are only going to be one solution, that's using strategic depth and force concentration to multiply force strength, so that Pakistan can deal with the Problem thrown at them with the Indian Navy, where the PN want, when the PN want.
If Pakistan want to heads-up with Indian Navy, the result would be tragic, if i were the commander of the Indian Navy, i will first target all surface vessel using a combine Air/Sea approach. At current stage, Pakistan Navy have a handful of surface combat ship at their disposal, on paper, only 11 frigate and 10 patrol boat. It would be a fatal error if Pakistan Navy want to try hold Indian Navy at bay with their megre firepower. Even if Pakistan can buy and upgrade 4 OHP class frigate and put them into fray, PN would still be looking at 50-70% casualty at the first Alpha Strike by India.
The solution is simple. What PN need is a safe haven, a place where their ship is safe in harbor and ready to be use as strategic reserve. A port that's outside Pakistan but close to, and safe from any eventual war with India. And then PN should put a great deal of their latest and most powerful warship there and place them as strategic reserve, using the older and more mobile ship to concentrate on making mobile run on Indian Navy in Pakistani Coast and trying to buy time. Pick a place where you want to fight the IN in detail while PN goes, then PN could roll IN over with the strategic reserve.
However, to have this to work, PN or PAF would need another force multiplier tool in a form of AEW aircraft. The key to fight a force concentration war is mobility, that mean Pakistan Military need to know when and where to deploy their force in the area they need to deploy. Where they go when they go have to be very precise and for that PN would need a very good early warning system. A good AEW network is a must for survival in an eventual war with India.
Personally, i am against putting fighter squadron and any land based asset together with the Navy, as they are almost needed elsewhere with the air threat and land threat the Indian Military Post. However, a couple of squadron to contest local air superiority is a must for PN Naval AO. So the Indian fighter/bomber would not and could not harass the PN at will.
In my opinion, it does not matter if Pakistan get the remaining OHP for sale or make good with F-22P, it does not really matter or affect how PN fights the IN, it's always how you could use those ship that count. If the safe haven cannot be established, then getting more OHP and whatever ship would simply prosponing the demise of Pakistan Navy
