If a link has a relation, it might be useful if Guise Mummy would regenerate the link based upon the mummy:regenerate attribute (the same one we use for navigation list regeneration). This is especially interesting for navigation relation such as next.
For example, something like this:
Guise Mummy would replace href with a reference to the next sibling navigation resource.
Also consider using <head><link> to define such relationships, e.g. to override the Guise Mummy normal discovery of these items. This might be unwieldy and subject to conflicts, though; probably provide some other mechanism outside the main file to explicitly navigation.