Since ordering of /sites is not guaranteed, how do i effectively order sites in a user-friendly way?

General requirements:

1. Trilogy must stay on the top of the list

   [stackoverflow.com,meta.stackoverflow.com,serverfault.com,meta.serverfault.com,superuser.com,meta.superuser.com, ...]

2. StackApps should stay on the bottom of the list or just belowe the Trilogy.

   [...., stackapps] or [..meta.superuser.com, stackapps, ...]

3. New beta Stack Exchange sites must be grouped with their meta site.

   [.., webapps.stackexchange.com, meta.webapps.stackexchange.com, gaming.stackexchange.com, meta.stackexchange.com,..]

4. Official Stack Exchange sites (out of beta) should compare below the Trilogy.

any ideas, thoughts, hints?