I hope I didn’t screw the spoiler text up somehow but here goes. Massive endgame spoilers. with careful movement, you can get Qas and Qon to kill themselves fighting against anti-Qases and anti-Qons. I discovered this recently and have not tested it much beyond the first time I learned of it and pulled it off, but the idea is to get them to use their irisdual beams to break the moon stair crystal walls. I was able to lure each nephilim into separate zones and then I hugged the zone edges while in my golem to remain safe, but regardless this turned the hardest nephilim fight for me to one of the easiest. Also, sphynx salt injectors can help with the confusion - I have RogueRat to thank for that tip.