So I've been hacking away at M+ Nordis solo all day. My best run so far was with NepDra/Reine/Alrescha/Gabriel/Blonia/NepDra. Got floor ten Nordis down to an imperceptible amount of HP with Blonia still up, but his first attack barely kills me by a couple hundred HP. Didn't occur to me until after that a Blonia activation would not have killed floor 11 no matter how good my board was since Nordis has dark absorb.
I just really can't see dual NepDras clearing content like this without a ton of luck. Even with two NepDras and four orbchangers it just runs out of fuel when it has to burst consecutively over and over and over, and the stats aren't good enough to tank actual hard hits. And it certainly won't be taking huge pre-emptives.
Maybe I'll have to give a Ryune friend a shot after all. Losing the extra RCV would suck and I'd struggle with the gauntlet of insta-death floors toward the end, but it would have enough HP to fully stall up on floor ten so if I could get to there I would win, and it can take a little longer to kill Threedia. If that doesn't work in a couple of tries, or at least give a strong indication that it might, I'm going to call it for now and accept that this stamina would be better spent on +eggs for now.
Edit: Okay, shit, wait. I misread dark bind as dark absorb on floor 11. FUCK.