For #3 I think a COTS-heavy approach is tenable. It just depends on the PAA's future requirements. If we are moving towards a UCAV-heavy environment, then payload and range may not matter as much. Rather, we'd need a platform that can manage loitering munitions and do unmanned air teaming with VTOL UCAVs. The latter can carry the payload and take on the risk, while the manned platform (as
@SQ8 said) sits back.
If that is the approach, you can design a LO-focused design around 2 PT6Cs. I think Paramount Group could probably design the airframe.
The real chokepoints are the critical inputs, like engine, rotors, transmission, etc.
If the payload is intentionally capped at x2 ATGMs on each wing with a 20 mm gun, I don't think anyone would have an issue with releasing the engine and other critical inputs.
In their eyes, these attack helicopters are just armed scouts, but in actuality, they're a critical management node for a vast loitering munition and VTOL UCAV network. Instead of weapons, you focus on the sensor suite, data links and ECM. Moreover, you don't even need this type of platform to do this work, so there's no point in blocking the inputs to Pakistan. However, we'd need some kind of tandem-seat attack helicopter capability, e.g., for COIN/CT or light CAS.
Something like the Japanese OH-1, but bigger, could be really interesting:
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