P5S complete! 
Exceptionally cool fight, and I'm really excited to come back and improve on this one because it was a very scuffed clear LOL. The difficulty peak in the middle caused some deaths that we continued to stumble forward through, but we also managed to do the last major mechanic perfectly on the first encounter with it and then got the clear from there. So... yay!
We called it early tonight because one of our tanks was out, so Monday will be reclearing to get them a book for the week and then on to P6S... 😱