CB if statement substitution for displaying all fields that are null or empty

I want to display a CB Content Module that lists all required profile fields that are currently null or empty for the logged in user, with Ajax editing.

I’ve tried using the ‘is regex’ operator for testing a field value in a cb substitution but it’s not worked yet.

What would be the best way to accomplish displaying what I’ve described?

IF substitutions aren't strict comparisons so the below will match empty string and null.

[cb:if cb_emptyfield=""]This field is empty[/cb:if]

Keep in mind some fields can't be null or empty string like integer fields, which will be at least set to 0.