Multiple choice, editable, multiline text

Here is what I suggest for just one of the Fields, and repeat for the others.

Make several formula text fields with the various Paragraph text words possible for that Multiple choice field.

Make a Multiple choice field with short choices indicating which std text to be used.

Make a blank multi line data entry field [Blank Target 1] as the "target" for the paragraph.

Then make a form rule that says

When the Target field is blank and the Multiple choice field is "Standard Disclaimer"

Action

Change [Blank Target 1] to the value in [Target 1 Std Disclaime formula field] 

So as soon as you make the selection, the form rule will copy the std words corresponding to the multiple choice selection into the editable field.