I don't know if it extends to all the interceptors nor if it works all the time. But I've found that another few shots of gauss after killing the last heart and before the shield comes up gives me the kill. Though it might mean that I have to eat a corrosive missile to the face too, but that's easily burnt off.
I just use a Cutter with a pair of medium long range beams with thermal vent.
It seems to help, but it's not a guarantee - as i said i still lost a pair of interceptors during the first CG and after that i'm not taking any chances not relying on the beams.
In my case the trick is to time the shots while watching interceptor health. Both my lost kills were due to me hurrying and letting the interceptors with only 1% health, then me zooming past them, till i managed to turn the whale, bam... NPCs / CapShip secured the kill - so both my loses were entirely on me.
But since there swarms are not a threat, even a krait mk2 can fit 4 gausses and a long range large beam turret - so large ships are not necessarily needed given the fact that flak cannons can be replaced with long range beam turrets on any build
The really disturbing thing for me it's not the CapShips stealing credits but seeing top-ten scores.
I mean really?
almost 22 billions for the 2nd CG?
even 9 billions for the 1st CG is a bit over the top. I mean 9 bn is like 90 hydras and 90 medusas (or 150 hydras)