I'm imagining where the AMCA will fit in...
Imagine we go to war today and imagine we had 250 Pak Fa, 250 AMCA and 200 LCA Mk 2- how are we likely to deploy them? My guess is:
a) To enagage enemy aircraft deep inside the enemy territory and carry out deep penetration and strike we'll use Pak Fa. It has range and firepower to support it
b) If aircraft are detected taking off from,say Karachi and headed to India, u'll send AMCA, so will you if you want to carry out ground strikes in areas not too far from India- smaller range & payload. It's theatre will be India, some pak and bordering regions
c) If the enemy reaches bombay, chandigarh etc. your LCA MK-2?
Of the three Pak Fa will need most of it's strategic stealth strength coz it's theatre MIGHT be almost entirely INSIDE hostile territory. AMCA- Hmm...partly in India. And frontal stealth might be enuf for head on intercept missions until they let go of their BVR missiles.
Just a thought.