The two areas where we have made phenomenal progress : AESA radar & SAM/AAM with Radar seeker. Given that all of these are available in-house, it has given us tremendous scope to scale and cover up the gaps due to fall in IAF numbers. Decade back we had only Perchora.
Our old radars are getting replaced with AESA HPR. We have Arudhra radar coming online, have Israel AESA, Swordfish AESA BMD radar etc. Our survillence and tracking net is going AESA in a big way. According to my current knowledge, even Chinese don't have this level of AESA rollout that we are doing.
Frequency hopping, multi beam, ability to direct power, algo controlled range etc. Linked to a network we will have a formidable net.
On the missile front AAD, S400, Barak 8+ ER, Akash, QRSAM, future XRSAM. That is 4 layers of networked missile air defence. We will be spending more and inducting SAM compared to fighter jets.
Even without considering IAF jets, Paks are looking at a very formidable air defense.