All the things/systems you mentioned are indeed important in their domains but if you have to single out the top most crucial ones than long range bvr missiles, subs and HQ9s stands out. Navy ships are vulnerable to subs easily. If India has to launch an attack on Karachi port thru airforce than they will make sure that their subs start making PN ships lives hell well in advance just before their air campaign .
Secondly on feb27 , AWACS might have played important role but it was Df20 jamming which really bamboozled iaf and aim120c5s, which outgunned them. Now pl15 will do the same job and hopefully even better.
Noted and thanks.
LOL then similarly I may say that Feb 2019 would be bluff without Stand off precision weapons and they are the most important ones blah blah blah. Don't be that much naive.
No system fights in a vacuum. Battles are fought by a complex synchronized well rehearsed manner with every weapons system playing its role in a precise synchronized manner in conjunction with other weapon systems of various branches of military forces combined. They may be categorized in various tiers and preferences acting as nodes in a comprehensive data linked network.
Even if a single system for a moment tries to act like as a stand alone weapon system and breaks that complex balance of that synchronized network then a chaos ensues just what Indians did by shooting down their own helicopter.
Even a mighty nuclear submarine is just a piece of junk metal pipe without all those critical support systems.
Frigates are themselves geared towards ASW with additional support from on board helicopter as another sensor node and weapons deployment system against submarines. They are an effective counter to subs apart from obviously ASW planes like P3C Orion.
HQ-9 or any SAM system has an inherent disadvantage that it's just a defensive weapon system only. And you would have to commit 200% each and every time, 24/7 with a huge support of your luck of course to defend yourself and the opponent needs to succeed just once. Can't block all bullets all day long while sitting inside a bullet proof car. That's why our military forces were fully focused towards offensive capabilities and firepower. No one can win a battle/war while remaining on the back foot. So in that perspective yeah its a great tool to defend our territory but no shield in the world is invincible or remains intact 100% forever under intense attacks.
A side note, missile boats cost a lot cheaper can attack in swarms and easily harras any enemy ships in a cost effective manner. Submarines are strategic assets.
Don't be overwhelmed by any single missile, aircraft, or vehicle. Or get ready to be shocked as is mighty "Asian Raptor" today and perhaps mighty "western ghost fighter" would be in the future. That's what they usually do and pay for it.