Hmm, I just realised the print-version of topics could also be a good way to extract post contents, especially as you can also get the entire topic on a single page that way. The downside though is that posts don’t contain profile links, nor avatars, both of which imho are quite handy if you want to include comments from others in your archive.
For a pure DJ-only archive, it would definitely speed up the archive process though, with a minimal amount of server stress.
If profile links were included too, additional resources such as avatars could be uniquely indexed separately afterwards.