Go to sub/bass treatment for IDM/chill?

Man I just find so many different tutorials, and all I want is a reliable go to sub bass that I can use on most of my tracks. I don’t do bass heavy music, but I definitely like a nice rich audible sub bass. Heard everything from keeping it just a sine, to distorting the sine, to using triangle... like what is a sure safe/starting point you all rely on and usually works well? Also when you analyze sub bass levels/vs kick levels on an analyzer, do they usually end up pretty close in volume? Mainly want best practices and commonalities. And lastly, does it matter what synth specifically you do this with? Why do you prefer one synth over another when you make your sub bass?