For weeks now, I've been trying to find the answer to my question as to whether or not the (bigdelete) permission can be used to delete pages with large histories without the (delete) permission. Obviously users would no longer be able to delete pages that don't have more than a certain number of revisions. But would that mean that they would no longer be able to delete pages with large histories?
Judging by how certain other permissions that delete stuff work, I'm guessing the answer to that would be "yes". Since I've done some tests on some of the permissions. (nuke) requires (delete) to work or it lets users access the page but doesn't let them delete the requested pages. Only permissions like (deleterevision) and (commentadmin) which are both completely unrelated to (delete) are capable of working without the (delete) permission.
I would test this out for myself, but I only have access to (bigdelete) on one site, and I also have (delete) on that site. However I don't have any permission that allows me to modify the permissions of usergroups. So I'm afraid I can't answer this question myself. I'm sorry if this topic doesn't seem like it belongs here, but I was really hoping someone here could answer the question, since I wanted to add the research to a page that I'm writing about various usergroup permissions, and what parent permissions are needed for those certain permissions to work.