There is no magic formula, if yesterday was cool the same mixture may not work today if its warm. Each colour with varying amounts of pigment may either need drowning in reducer, or may need none. Pigments prone to tip dry need more. If you want full coverage, then less reduction and more pressure, fine detail = the opposite. The surface may allow paint to sit on the surface so could skate or blow through if pressure to high, so need low and over reduced. Absorbant surfaces will need paint blasted into the fibres, less reduction more air. Etc, etc.
Conditions/weather, paint brands/different colours within that brand, surface, style of painting, brush used, effect needed, size you're working at, all affect your ratios. And you need to adjust on the fly.
Basically what works for one may not work for another with all the variables in play.
So think opticians - make adjustments. Is that better or worse? If it's better, can it be made even better, if it's worse, back the truck up. Paint should lay down satin smooth - no grainyness, no spattering no spidering. Lines should be crisp, no skipping or spidering. More reducer = less air.
It is well worth taking the time to experiment and get a feel for it. Soon enough it becomes second nature,and you'll be adjusting for variables on the go without even realising.
My personal preference (unless spraying onto material or large areas) is generally low pressure more reduction. You may need to build more layers, but you get very minimal tip dry, more subtle blends and fades, and finer detail.