I’ve never mathed salts

Hey guys so I’ve always just ranked up salts constantly. I’ve never set it to auto refine. I know that there’s supposed to be levels where it’s maximally efficient to stop and have it auto refine so the later ones upgrade quicker but I’ve never bothered.

For example

my red is at level 147,

Orange 80,

blue 47,

green 45,

pink 30 and

black 21 (

Yellow polymer at 5

I’m not great at quantifying lots of numbers against each other soooo, should I do anything?

I’ve seen that old schematic of salt tanks to stop at to refine infinitely but they only go up to red 45. Also If I do that am I supposed to set auto refine to refine at 100%? Idk! Any input would be graciously accepted