I hope with this video to have answered more of the question. In short, set your criteria with reference tracks. Be able to listen to just low end (use headphones if your room is poopy). Listen for the amount of elements and write that down. Be strict with this to not overcomplicate yourself. The more you add in the sub area the fuckier it gets to mix it.
If it's a clinical sound most likely the following needs to be applied:
1. Consider one low end oscillator for your bass (one sub sine or triangle oscillator).
2. If other elements play in the low end figure out if you are causing dissonance (alter pitch to a complimentary note). A tiny bit of music theory should be know but try a whole step vs a half step on your piano and go up from there in half and whole steps. You can also make it the same pitch but then your sub amount just builds up.
3. If other elements play consider getting rid of the low end via EQ . If those elements do not have top end when you cut them away add saturation till they do.
4. Sidechaining is a popular way of getting rid of low end energy as well but I would only do this for main elements like the kick.
4. Set the right volume via making sure no low end plays unless you add the sub oscillator.
As for lufs I really do not think it's smart to set levels like this but.. -10 kick. -22 sub, and mid bass. Please completely forget this sentence once you read it because it will definitely backfire haha.