I agree with the others, I would have tried 12.25 too. The saying here is Know Thy Cat. It is even more true for high dose cats because of the extra, seemingly random, factors at play. Some high dose cats are sensitive to small changes, so you have to see if that is true for Beenie. I have seen one acro/IAA kitty here over 20 units and sensitive to 0.25 unchanges.
My goal was always to be at a dose that minimized time over renal threshold, yet gave me decent sleep. A dose with nadirs in low 50's is not that! So maybe the 0.25 increase can tweak the nadirs up a bit but keep the higher numbers down. At least until the acro tumour output changes or IAA decide to act up. I found keeping at a dose with some greens helped keep the IAA somewhat better behaved.
In general, you will always be tweaking and modifying the dose due to the other factors. What is a good dose today, might not be next week. Be flexible and follow where the numbers lead you.