Atziri the Fell Serpent

Atziri goes immune to damage and she keeps using I think its called Blood Spear Barrage, the Corrupted Blood balls. I have seen others complete this fight and she is roughly at the 5% mark. I am a poison bleed shield wall build I do not know if the DoTs ticked as she was doing an ability causing this to happen or not. I have seen other videos where she has bugged but they were able to leave the fight, I am not able too.

This is the first time I have been able to make it to Atziri. I just got a good augment for my leg. So this sucks, I can force respawn which it is a respawn and I do not want my character to die. Is there anything else I can do? I would like the quest reward, loot, and not to have my character die.

Thank you for your time,