Precisely; a large swing over the ocean opens up a completely new axis the Indians will have to spend vast resources to monitor much less dedicate interceptors to counter a low flying strike package.
A long legged launch platform that can be bought for cheap like the JH-7A should be seen as just that, a launch platform; escorted by JF-17 equipped with 3 drop tanks, PL-15 and PL-10, should be adequate enough to position the Strike package to launch long range stealth cruise missiles. F-16s could be an another option is they can be spared from defending across the LOC and IB
This is the approach of the US and UK forces with the LRASM and new MBDA stealth missile
Wr also have to remember that it may not be assets near Mumbai that need to be combated but a potential Indian carrier based blockade. Where a similar approach; launching waves of missiles from multiple angles along with jammer missiles like MALD-J is the best way to get the job done and on the cheap.
MBDA missiles at 3:07; both stealth and subsonic as well as a less stealthy supersonic option
LRASM
MALD
While the JH-7A has no where near the payload as these bombers; missiles have come down in weight, but the wave concept (except from a lot further out) still holds. Especially with great EW equipment.