I know that Rafale have become your religion, and I am not going to argue with you. Let me explain to you the dangers of your tactics
1*First, relying on its high superiority, China has set up a series of plateau radar stations in the Himalayas. These types are meter-wave anti-stealth AESA radars,In other words, the whole of Northern India, the air situation China can know,And the Rafle take off from the plain thanfell under Chinese surveillance from the start
2*China have lot of AWACS, like the KJ 500, KJ 2000, they can greatly fill the radar blind spots caused by high mountains,
3* China is equipped with a large number of independent air defense systems, such as HQ 17 and 09 anti-aircraft artillery。 the could be deployed on the Rafale's possible attack route, We have publicly demonstrated many times the use of AWACS to direct these independent air defense systems
1. The opposite. Tibet is 4000m up, radars can't see anything below that. And if you position radars over mountains to look down, they are easily defeated. India has the radar advantage because all our plains radars are working in look-up mode. Of course, they can't see beyond horizon, but it's compensated by AWACS.
2. AWACS can't see beyond horizon, and the horizon in this case is really, really high. This is the IAF's advantage.
3. True. PLA has a lot of SAMs, but it faces the same issue with horizon.
I'm afraid that when it comes to surveillance, it's completely to the IAF's advantage. PLA has to compensate for that via a satellite based surveillance system, which we know does not yet exist. All 3 points you made are disadvantages to China.
Ingress is also to the IAF's advantage because they can use valleys to fly through, operating below the radar horizon of Chinese radars. Otoh, while China can do the same, any Chinese attack will become visible as soon as the Himalayas are crossed.
Rafale doesn't have any special advantage when using the terrain, any aircraft can use terrain. The advantage of Rafale is it can stay hidden a lot longer than other 4th gen designs because of SPECTRA and it has some additional safety features that makes low altitude flying safe and reliable.
The Rafale cannot fight the J-20 head-on, but it's been designed to avoid everything in its path while conducting a bombing mission. The French have a history of accomplishing strike missions without being detected in exercises. Due to a strategic requirement that requires the French forces to fight the Soviet Union alone, without NATO assistance, they have developed capabilities others have not to compensate for their lack of numbers. It's also why their weapons are unique, like the MICA and Hammer, even ASMP.