I went ahead and did a stint just to see what I'd get with Nejtun's HDF Enduro V2 setup.
"The tire wear you have described is working as designed and consistant with overdriving and/or excessive ABS activation."
I don't know that any of us are really qualified enough to tell iRacing they're flat-out wrong... The question is what are you going to do about it?
In my full stint, I never saw the ABS lights flicker, ever, so I'm guessing the key is to stay out of the ABS. I don't remember if Nurb was before the ABS rework, or not, but I'd also say it is easier to be over-confident/over-drive Spa (a 7km race track that almost anyone has memorized like the back of their hand) compared to the Nurb (a 24km monster that only 1% of the 1% truely has memerized) that I personally know I was driving scared >90% of the time.
This was at 40% track state. I feel like even that is low, but anything less than that seems to be a waste of time. We know the tracks will rubber-in in endurance events, just the rubber that gets put down in warm-up and qualifying is always impressive, and that the first stint is always the worst on tyre-wear, so this should be worse-case scenario.
If you're in the ABS, you're braking too hard, minimize your braking when turning in (like, to zero, if possible), error on the side of turning into a corner too-early rather than too-late (don't late-apex ANYTHING), and DO NOT brake on the curbs. You can use the curbs on exit when accellerating, but the ABS will flicker if you brake on them, and I can feel a LOT of sliding on the curbs, so don't even look at them when braking.
When I used the same time of day, but added some clouds, the tyres looked even less sketchy. I was actually impressed by the consistency over the run. I usually don't see that, so that was weird. Any anomolous lap was due to my wheel not shifting, not because of handling.
