Yikes!
I feel like I have stuff go wrong a lot, much of it of my own doing.
Getting an embedded video to play during a presentation and then making sure that everyone on the Teams/Zoom call can hear it is something I am incapable of. So embarrassing.
Dealing with the seizure was way easier. 
Have you ever looked at Neko's SS when her antibodies were breaking? Mid August on in 2012. There was also the combo of SRT happening. We used to use lime green for all greens on the SS, so that part looks different, but overall not too dissimilar patterns. Other than the fact she was guaranteed to bounce so I didn't have to BCS or skip, though I did occasionally do back to back reductions. I felt like I was pushing hard against a tide of antibodies, occasionally I could get through, then it would wash back again. Sort of like some antibodies would die and release insulin, then a fresh batch would start up, but not as many.
What led to the increase? I’ll start with what led to the initial decrease. BK had developed a lump, a little larger than a marble, just above the scruff. It was removed on 10/23/2008 and thankfully was benign. while he was under anesthesia for the surgery the vet took the opportunity to take a good look at his teeth and gums. There was a tooth way in the back of his mouth that had broken away but not completely- there was a part of the root still there which she easily removed. His teeth and gums were beyond what she was comfortable handling and she referred me to a veterinary dental specialist.
BKs teeth and gums were clearly his Achilles heel. If Oberon has never had a dental cleaning, consider getting him to a specialist. Keep in mind that kitties don’t “open up and say ahhh” and even if they did you don’t know what is going on under the gum line. There could be resorptive lesions that are only visible if radiographs are taken.