NSG is drilling everywhere these days (schools, hospitals, malls, hotels, temples etc etc) and doing some other very important things alongside such drills that are not wise to discuss on an open forum. That said, I still think there is a LOT that needs to be done for India's primary intervention force, their CAPEX budget needs to be massively increased so the induvidual SAG operators have as much spent per guy as any western specialist unit (can easily be done as SAG is actually quite small in number) and most importantly they NEED their own airwing
1) for the main CT task force in Delhi (preferably a fleet of turbofan a/c deployed at IGI for them to transport men and materials anywhere in India/the world).
2) EACH NSG hub to have 3-4 dedicated medium class helos 24/7 ready to transport their ready team anywhere in the hub's area of responsibilty or to transport them to the nearest airport if they need to fly out to support another hub/the main CT task force.
I still think the NSG remains rather toothless without its own airwing, having well trained men in one spot is regardless if they can swiftly get to where they need to go. India is so vast with such poor transport links that the only way to go is air. As we have seen in Paris, Belgium, San Bernidino, Orlando, Ohio etc etc the first few MINUETS are vital, it is no good if the NSG turns up 4-10 hours later; the damage will be done by then.