I dont know if you are aware of this but the Thunder can launch its BVRAAM and it can let the Erieye guide it in to the MKI, just like the MKI could do that with the Phalcon. But lets for arguments sake say both sides use their own radar to guide their BVRAAM's, what missile does the MKI possess that ranges more than 150km. Thunder's radar has roughly a range of 150km, thats more than enough time for it to detect the MKI and launch its missile and guide it through his radar.
The more realistic scenario is that both these aircrafts will take a shot at each other roughly around 60-70km at the same time. At this range, the proababilities of getting a kill are higher than getting a kill at their maximum ranges. So my friend, its not as easy as you make it sound. Just because it is an SU30MKI does not means it automatically wins against the JF17, a lot of other factors come into play. What will matter the most is the skill of the pilot, which ever side has better trained pilots is likely to outclass the other.
We should all write a Thank You note to IAF for introducing AWACS into the subcontinent, without them we had no answer to the MKI's radar
. As they say, the bigger it is the harder it falls. Would love to see the MKI with its huge engine and RCS dodge a heat seeking missile.