I would imagine doing multiple levels at the same time would average it out. What I do is just get it 5.5-6.2 if it's in between there it's good. ph matters but I have never noticed a difference when keeping it at a specific level. I like to do the method with minimal effort that's how I get the best results is by giving the plants less love lmao. Obviously I do training methods of course but I neglect watering at the beginning on purpose so the roots will spread in search for more water.