Whew on that 92! I'd test again in an hour. How much Evo did he eat, and when? I know you say 7:50 in your notes, but since I don't know when preshot is, it's easier to see it in terms of the + hours. If you put a little dry in front of him again, would he eat it? If we can get him to eat several small meals of food he's used to and keep it down, you may have an uneventful night.
I don't have experience with Fortiflora myself, but I have heard a lot of others say it really helps their kitties eat. And some members use it when their kitty is on an antibiotic, to prevent diarrhea. I've used another type of antibiotic for that purpose. I had no problems converting Neko (or my one civie). They both already got quite a bit of wet when she was diagnosed and made a transition to raw very easily - thanks to Neko's acromegaly and super polyphagia.