This seems to be a high-chlorine year for most people, me included.

I'd start by raising CYA to 50 and see if you do better on chlorine and daytime consumption. You'll probably want to keep your regular chlorine level around 5, not the lower limit of 3.

If pH is stable, don't mess with Total Alk. You have a vinyl pools so TA=170 isn't a problem, if pH is stable.

Carl