Need your opinion on living dex organization

I wanted to start collecting a living dex, including all forms (regional forms, megas, gmax), and one thing that I’m unsure of, is how to organize it.

I was initially thinking of doing dex number, which would group regional forms along with the regular forms, scattering them all about, but then I was wondering if it wouldn’t be better to organize it by generation/region. This would group all the regional forms from one region together.

What do you think would look better? How would you do it?

And as a broader question, how do you organize your living dex in general? I’m curious to see how others do it!