So, what I’m seeing in the field so far is
Sections (Repeater)
Columns (Select)
Column 1 (Flexible Content)
There are 5 layouts to choose from
Column 2 (Flexible Content)
There are 5 layouts to choose from
Column 3 (Flexible Content)
There are 5 layouts to choose from
I’m not seeing how this relates either of the hierarchies that you posted. Do you mean to have all of the fields in all of these 5 layouts in a single layout?