Surface vessels of Pakistan are easy to take care of. They don't have any long range AD. Look at their new Frigates. Their fire control radar has a first blind speed of around 1000m/s. The BrahMos at sea level is very slightly faster than that, which means that their SAM FCR won't be able to see the BrahMos, let alone intercept it. Add to it the fact that we are about to create a SCRAMJET powered cruise missile, the Pakis won't have any hope of seeing that missile forget intercepting it. They are sitting ducks. And then look at their offensive weaponry on those Frigates: subsonic short range cruise missiles. We out-range them and have world class Air Defences.
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Their submarines will be a problem, but those are also not the quietest. My money is on the Kalvari class to have a higher availability rate and being quieter will easily shadow the Paki submarines and once located, SMART can easily sink those Paki subs. The first time Pakis will realize that they are being targeted will be when their passive SONAR detects multiple splashes all around them and then they hear multiple Shyena LWT spiraling away in a search pattern, their SONAR pinging, looking for them. And they'll be smack in the middle of these torpedoes. At that point, they are toast. I am not even including our P-8I, Sea Guardian drones, Rustom-II (whenever it comes), AUVs, underwater gliders, etc. Not even including any Surface ship like Kamorta either. Once you introduce them, I don't understand how we think the Paki subs will be able to undertake offensive missions. They'll be sitting in port or stick close to the littorals.
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What we need to focus on right now is:-
1.) Refit all our ships with DRDO VL-SRSAM (once it completes development tests). That can drastically increase their capability. And we need to retire the dinosaur era arm-launched Shtil-1.
2.) Increase our submarine fleet.
3.) Add drones for ASW (AUVs and UAVs).
4.) Focus on making the NGD and NGF with as much Indian weapons and sensors as we can. In my opinion, its possible to build them without reliance on foreign weapons and sensors. After that only the turbines, gearboxes, shafts, etc; i.e. propulsion section would be of foreign origin. That and the main gun. Which means we'll be able to make more of the NGD and NGF follow-ons, we might even standardize on that design like the Americans standardized on the Arleigh Burke and the Chinese on the Type 52D and Type 55.
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So relax. On the seas, we are comfortably ahead of the Pakis despite the other AORs of the Indian Navy.