I actually started doing something like this myself, although it never got into a form that could be posted. However, I was using the classic Seraphim (along with Metatron and Sandalphon) to represent the highest echelons while relegating the Hebdomad to Cherub status. Still, I like Angels and Archons just as much as I do Devils and would be happy to provide what I already had written in addition to my efforts.