Why do we need an air borne or air assault divisions? Both these formation require huge investment in fixed as well as rotary wing aircraft. Additionally there is a requirement for light artillery as well as airmobile IFVs /light tanks and AA guns. Airborne Division is really required when one we needs to project power far from the countrys shores.
PA is faced with a much larger IA which is able to open many fronts along the border in order to exploit its numerical superiority. What is therefore really needed is a Rapid Response force of a about 3 brigade strength that can be used to reinforce a position quickly when required, plug a hole in case of a break thru (as happened in Rajasthan in1965) or for providing infantry support to a rapidly advancing amour.
All of the above tasks can be performed by a well trained Light infantry force. The manpower can be transported in a combination of fixed wing/rotary wing and/ or high speed motorized vehicles. Troops should travel armed with small arms only. With the heavy equipment available in pre arranged strategic forward locations.
Think army aviation already has sufficient assets available to shift a brigade strength force in one go. The same transport element can subsequently be utilized to shift another brigade to a different location.
Pakistan not being very deep; if we were to have these three RR brigades located say at Jacobabad, Shorkot and at Jhelum; it would only take a few hours to shift one of these brigades to Kashmir, Lahore or Rajasthan border as the case may be. Heavy equipment to be transported from nearby locations to meet up with the troops just before the engagement.
Naturally every thing has to work like clock work and it would take a lot of hard training and exercises before such a force can achieve its true potential. But once we have achieved decent level of proficiency, each rapid response brigade can be a great force multiplier.
Air borne commandos and anti terrorist paramilitary is another question and should be dealt separately as the objectives of these forces is different.
Unless both the Para drops and Rapid Response force is needed simultaneously, we can make do with a lot less aviation transport element thus achieving our goals at much lower cost.
