I would like to see what others are changing when you start a new bag of coffee. I will preface that I only do pourover.
I keep my ratio the same as well as my brew temp/# of pours. I really only adjust my grind size to aim for similar brew times and then from there adjust grind size based on taste/astringency.
When dialling in (I’m new to it), I like to try and maintain the same brew time. So I’ll adjust grind size to try and account for this, although I’ve found that as I go through a bag I end up wanting a finer and finer grind. Does also depend on the roast of the coffee, so if a roast is darker than I expected I’ll grind a little coarser as I believe darker roasts extract more easily.