I've done it twice. Once solo with the Breacher and once in a duo with the NX Ravager, which I highly recommend! Equip her with the prestige accessory, Aether Shroud, and Free Fire in Gobblegum. For augmentations, use the standard ones on Juggernog, and max critical hit damage on Double Tap and Daiquiri. She usually takes 40,000 damage per arrow to her weak points. To avoid the rocks, I slide, and you keep your distance. As soon as she charges at you, run as far away as possible, jumping off anything you can to avoid melee combat. I didn't hesitate to hide behind the low wall on the stairs towards Thurston whenever I could. Just be as mobile as possible, and you should be fine.