Blogger – Export Blog Entries to Individual Text Files

I have a friend with a Blogger blog (this one: PuzzleMad.co.uk), he wants to create a local archive of the individual entries. Now, exporting produces a large XML file which is fine as far as it goes, but the goal is to create an individual text-file (.txt for preference) and ideally with a Markdown representation of the content's formatting/structure for each blog-entry (the inclusion of comments is entirely optional and, depends only on the ease of including or removing them).

I suspect that this might involve applying a scripting solution to the exported XML file rather than a feature included within the Blogger engine itself, which is absolutely fine but might potentially be better suited to Stack Overflow.

I've looked at a few possibilities, from a search here, including:

• How do I export my blog from Blogger? – which is more about freeing up photo-space from the linked Picasa service, and has only one answer which mentions that and then suggests the export-as-XML (which is either not a solution to this problem, or is not a complete solution to this problem).
• Export blog entries from Blogger – doesn't seem to address the problem to which I'm looking for a solution.

Potential solutions:

• Zoundry Raven – could possibly work, but it seems to be advertised/promoted as a means of managing multiple blogs rather than as a means to download/archive entries from blogs.
• SiteSucker – retrieves and archives, but stops at that point, doesn't convert to a text file, certainly doesn't create a Markdown-esque representation of the text, or its HTML structure.
• Backupify – I'm not quite sure what it does, but doesn't seem to, from what I've read, offer a specific means by which exporting-to-text is supported.

As noted, I suspect the end-result will be some form of parsing of the XML, using a scripting language, but if it's at all possible he'd prefer to avoid that, but is willing if necessary.