Cleared on July 20th 2023 We didn't use pots because we were still progging in this pull. We were seeing Caloric 2 for the first time, and it turns out to be the clear run too.
Th explanation is in the lore related to the Heart of Sabik, which I'm not really familiar with. I also didn't include the phase 1 to phrase 2 transition, but the cutscene shows that she thinks the world is flawed, so she put that world into a bubble, and she transform her form into a god with tentacles that wraps around the bubble, and she begins attempting to destroy it. And we are inside that bubble trying to protect it. So when you have this "platform" to fight on, it's just a zoomed out view of the bubble.