Sir, you are not getting the point. Now be practical PAF cannot win the air war in Indian airspace at all and any attempt would be suicidal, and only lowers the air defence of Pakistan. Only option is the high use of Hale UAV not to cross the border but fly near the border to provoke the SAM, so that the radar location could be located. That would need very high degree of strategy and its not a single day work , but can involve several month before the D-Day. Also the covert agents, to be activated to give the information of the SAM sites.
Now when the SAM sites are marked, now you need is the dedicated ground attack DPSA, like Rafale or SU-34 which is capable of flying at very low level, virtually just above the tree top, at very high speed, and could carry load and are certified G level to carry such mission so that the plane always fly lower the horizon. These aircraft don't have the specialized A2A MMR instead the Radar capable of SAR mapping of wide ground area, thus making a clear picture of the ground target from long distance. E.g India have Jaguar for that role. In short doing SEAD mission for a very strong enemy. YF-18 should be only fire for the Awaac not the S-400 because it will be distroyed by S-400 smaller QRSAM.
After the destruction of the Radar sites comes the DEAD which could be done with JF-17 to fly in pakistani airspace and won't cross the border , and attacking with glide bomb or other weapons from the strandoff distance.
@PARIKRAMA your take