Thanks, that's of course something to keep in mind as well! However, because the process of wait-listing is so murky and depends on both POI and admissions committees input, it's hard to really know for sure who had the final say in putting you on the waitlist. For example, I know a professor I used to work with has, in the past, had a top choice of hers on the waitlist because the committee felt more strongly about another person she liked slightly less (not that she wouldn't have been happy with either as a student). So theoretically I would be fine with choosing a department for who I was a backup choice as long as at the end the POI had been pleased to have me work with them. But there's no real way to know that.
I'm also not sure I've ranked these programs as clearly in my head as that. I don't really have #1-8 choices, because I haven't had the chance to learn about the inner workings of the department or meet and speak with some POIs. I'm very resistant to the idea of deciding which ones I like better just based on papers, department websites and rumors.
Anyhow, at the end of the day I am still very grateful to even be wait-listed at these places. Hopefully I'll get accepted and feel like I have more options to choose from, but if that doesn't happen, I'm lucky that I could see myself happy and productive at the places I've been accepted at.