So i've finally got her back, and it's not what it seems.
Injector - Fine. Coil Pack - Fine.
The culprit? The plug into the coil was corroded to hell, and had corroded the wire into the plug away completely. Real pain, and about $800 in labour to fix.
Which brings me to my next question. Given the fact that it was misdiagnosed by nissan service, and having them repair it wouldn't have fixed the problem, and the actual cause was something that (according to B&M) should really have been picked up on if a decent look was had into it before deciding it was an injector, and subsequently not testing the injector to confirm it, how likely would I be to recoup some of the costs from nissan service, given they have a three month warranty on their work?