[rnbwpnt]

Calibre 5.5 (on Kubuntu), with a library over 23k books in size.

I'd like to delete duplicate formats of individual books, on a priority basis. For example, I'd like to specify that formats be kept in this order:

1. azw
2. mobi
3. epub
4. lit
5. pdf
6. doc/docx
7. html

Because not every format exists in every book, or is convertible, I'd like to use the above priority for deciding what to fry and what to keep.

Is there a decent way to do this? Is there a particular search term I should try? Most of what I see is deleting duplicate books, or a mass delete of all of a particular format, both of which aren't what I need.

Thanks!