I would bring in PA units to take over defensive duties and use Gilgit Scouts and FCNA as well as special PA units for offensive operations. I agree about this being an airborne affair with heavy heli usage.
I think by major artillery and airstrikes, triggering multiple avalanches, you'd have a very good situation for heliborne assault. But the issue should not just be numbers - it can be more. Like the turret idea you used - by using remote turrets and UGVs, dropped onto mountain strategic locations, you can robotize the war and reduce your logistics foot print. Let them be electric run turrets, stationary or mobile and charging can be from solar power.
Airstrikes will completely change the equation and a major disruptor for India.
Another out of the box solution could be use of jetpacks. This technology has advanced and perhaps can be trialed at altitude to see if they can be useful.
Stretched logistics can only be sustained with a better air transport fleet than Pak currently has. This is why I was suggesting that Pak get the C-27J Spartans which are sitting in the Boneyard with little airframe use. Even if a Chinese platform is acquired, these will help. Z-20s would be enormously useful as well, and again could be a major disrupting influence.
Last but not the least - perhaps the most - drones. Drones in numbers not seen before.
PA aim should be to use Siachen as bait - snatch it, and let the Indian ego try to take it back, as they shift forces, perhaps PA could attack other sectors as well, kind of a prelude to a Kashmir war.
Airstrikes in Siachen with precision munition will severely impact the Indians. This will reduce their numbers, and inability to reinforce would also help. Airborne assaults would allow rapid force concentration.
If there is any offensive, it has to be in months of summer due to adverse weather. Its easy to defend in snow conditions than attack. So its better to attack when snow has melted, gain some ground and defend it when snow fall starts again. Snow affects man and machinery -both.
FNCA and GB scouts just make 4 brigades in total, that is still a very small force to start an offensive. Its not the roads or intersections that need to be taken, peaks need to be taken too to secure flanks as well as guard the captured area. India consistently used Artillery and Air force to strike PA positions in Kargil war which brought results, so these are tested weapons in that terrain. PA would need other heavy weapons like RRs, rocket launchers, ATGMs, mortars etc. These would require rounds to be carried and then re-supplied. Only G-3, Sniper rifles and MG-3 will not do the job.
Air strikes are of many types - CAS by Mirages/JF-17 as PA Infantry initially starts its attack on CFL, Interdiction missions to destroy enemy reinforcements and supplies en route to CFL, SEAD/DEAD Ops to shut down enemy AD for helis to operate, Strategic bombing to take out enemy supply/ammo/POL depots, Barracks/HQs and artillery positions, "Broken arrow" bombing missions if own position gets over run etc.
PAA is poised to use its gunships for Anti-tank Ops against IA armor, so its doubtful if any gunships will be used in this sector. Two engined options for gunships could be better in J&K sector. AH-1F are single engined. AH-1Z seems a viable option, if PAA gets WZ-10 or T-129 its doubtful that they will be spared to deploy in this sector. PAA will need to create an air bridge of transport helis from a base like Skardu to forward lines. Supply through mules and motor transport will take days to reach front lines. Med evac is also necessary.
Jet packs are a costly solution, plus the power/thrust at high altitude and snowy weather conditions will need to be tested.I did start an amateur topic on robots to be used in Siachen war when i joined the forum back in 2015. Battery issues could exist and enemy EW warfare has to be ascertained. Siachen is a resource draining sector with minimal gains. I would circumvent Siachen and try to capture area/road behind it to completely cut enemy supply line.
Drones deployed in high altitude mountain warfare might need some modifications. They can be shot down by radar controlled AAA or even manual HMGs, once detected. For day and night surveillance, there is no better option than drones.
I dont know why people want PAF support when army aviation corps has armed uacv that alone can be used to hit Indian supply lines without much trouble all we need is better armed drones which can fly high and cause havoc and some really good artillery cover the uavs can play double role designate target for artillery and do precision strikes if we can hit Indian army posts with uavs there would be nothing India could do about it if they call their airforce we call our airforce the main point is we have to be swift and well prepared in numbers that's how offensives are done nowadays use uavs to target well managed defensive lines use artillery to cause more havoc then use uavs to target supply lines hit aerial transport with manpads capture destroyed positions quickly if you allow the enemy to assess the situation and counter attack you have literally wasted all your effort
UCAV carries limited payload and has limited weapon options. Burraq carries Barq missile, thats all and two at max i think. Aircrafts can carry rockets, missiles, bombs etc and more than 6-8 ordnance. UCAV will need air cover to operate, so PAF will have to go in to enemy airspace in any case either for DEAD strikes or air superiority missions for drones to operate in enemy territory.
UCAVs do not carry A2A weaponry as yet, and UAV cannot transport troops though it can carry very limited cargo like medicines, so PAF will need to go in to provide air cover to transport helis.
If you’re going to throw in the Air Force, why not simply pull back and let them wreck havoc on the Indian position. Let them deal with the avalanche and all the problems of supply and maintenance. Just let it be known that you won’t allow anyone to take up posts in that region. Remain in your defensive positions on LOC and let the air force root them out and deal with IAF as well.
The plan is to capture J&K, not start an attrition war. India can keep throwing in men and material at PA, there will be no end to it. And even if enemy positions are sabotaged by avalanches, PA will still need to clear all those areas up to advance into J&K. It will become a double task and will take away lots of precious time especially months of summer.
... Just to add..
The last time someone thought of a serious assault against well defended positions A BIT BELOW Siachen, the attack ratios were calculated at 16:1.
This is a numbers game after all. 16:1 is almost impossible to achieve for PA in terms of infantry. Other factors like Aircraft or gunship or cruise/ballistic missile strikes could bring it down.