I wish I could define Building Material's Intersection Priority at an element base. (As solid, Composite and Complex Profile)
A single Building Material can have different priorities according to many specific situations in a project.
Duplicating a BM just to match random situation can lead to an attribute nightmare. Specially with hotlinked modules! (Let's wait for GS to implement a single shared attribute & details file for this )
There could be a default Intersection Priority Number (defined in the BM Manager); and there could be an element level definition. Like the Wall Intersection Priority Number.