The IAF advantage is not as formidable as you think.
Firstly, in an offensive role, not all Su-30s will have AWAC coverage(due to logistical constraints) while most defending front-line PAF fighters can tap into AWAC or ground based radar targeting information. This neutralizes the radar advantage. As long as the PAF stays on home turf and plays the defensive game, the Su-30s can be blunted.
Secondly, the IAF has a very fragile logistical tail. Most key subsystems(engine blades, IRST pods, Radar....etc) and BVR munitions of the Su-30s can't be manufactured from scratch in India(assembly from imported Russian/French parts isn't gone to be fast enough in wartime). Moreover the Indian transportation system is in a terrible state of disrepair and that even transporting parts and munitions from supply depots to front line bases would be slowed down considerably. All in all, the IAF only has enough spare parts and BVR munitions for about 1 week of a high intensity air war. The same rules constrain the PAF, however, the land border with China would allow us to resupply the PAF much faster than Russia/France/Israel could supply the IAF.
So ultimately, if the PAF can hold it's ground for 1 week against an IAF offensive, then IAF will either have to stop the offensive, or bear unacceptably high losses and still not gain a conventional victory.