That is subjective. I would say no more than 500 tanks.
Agreed. Which is why I have said in other threads Pak does not need a large navy. A small coastel force and few ships is enough to perform maritime security tasks.
What Pakistan needs doing is -
- Have a small "strike force" in the army ~ max 500 tanks. This should provide sufficient nuclear threshold. Too high and it increases the possibility of war as both countries might feel they can accomplish or "play" within the threshold. A more tighter and lower threshold will force governments on both sides to behave themselves and stay within the very tight "red lines". This would reduce room for adventure and war. Whatever threshold Pakistan goes for India will be able to destroy as India simply has far greater population resources by a factor of 6.5 times and can deploy a vastly greater conventional force.
- Therefore go for a low threshold that does not strain Pakistan's resources that might lead to something similiar as what happened to Soviet Union and implode under the strain.
- Thus have a lean military with clear and unambiogious declared nuclear use policy as deterance. India must know that as soon as the small Pak Army "strike force" is destroyed Pakistan will place the finger on the trigger. Leaving no doubts in New Delhi what the consequences will be of continued progression in hostilities.
- Maintain a robust defence posture layered as follows on a escalating progressive scale. 1 - Conventional strike force. 2 - Tactical nuclear force. 3. Strategic nuclear force.
- Understand that with nuclear forces in place there is nominal threat to Pakistan from any exogenous states including India or even USA. Thus focus on nuclear forces making sure they keep a robust and effective nuclear profile and that is conspicious by it's deployment.
- Understand that at present the greatest threat to the Pakistani state is from internal schisms and radical groups. Followed by economic collapse that would feed into the schisms and radical groups agenda. Therefore money saved from the reduced "India centric " forces is invested in huge internal security force similar to Turkish Jandarma numbering at least 400,000 that has air, MRAPs, all other specialist equipent to go and secure the internal stability of the country by taking on all radical and anti-state groups head on.
Increase money on primary education nuturing a new generation that can help leverage the massive potential of the CPEC project and trade with China.