So I had another, similar incident (reverski with LR weapons), this time a Cutter in Eravate. I got interdicted by an NPC pirate, he jumped in shortly afterwards and started opening fire. I was in the same FAS, but this time with 2 small/2 large rapid fire pulses, all phasing (and gimballed because fixed on a gamepad is just too twitchy for me).
As this happened very close to the star, and he was pestering me with LR beams and the occasional rail strike, at least one of them causing heat build up.
I managed to catch him a few times, and with FA off landed a few hits. Got him down to below 90%, but was around 55% myself and ran out of heat sinks so decided to bail. Think it was about 5 minutes or so of combat time before I high-waked.
It was again very tedious and a game of attrition, given his shield/hull health was always going to be a losing battle without more specialised gear (but I knew that already, just wanted to see how it goes and this was as good an opportunity as any).
Morale of the story for me at least, really no point in engaging for too long as it'll go nowhere. As Ramius above said, what's the point.