I am unsure why you would want to achieve a really low action, it does not improve your tone in any way. Don’t take my word for it, but Patitucci, Gwizdala and a host of others have all realised that really low action does not equate to better tone.
I totally did not buy into that initially and was all about low action, but after trying it I was amazed at how much more punch and tone you get when you raise that action. Currently I am at 3mm at 12th fret, which is a happy medium between playability and tone.