The order is critical beacuse once selenium toned it's harder to bleach the print for blue or any other toning.

I have done this but back in the late 1970's into the late 780's. My preferred blue toner was to use a dye coupler in a colour redeveloper, this was what the late Bob Carlos Clarke did for other colours as well, it's worth seeing his book Dark Summer. For some reason Tim Rudman didn't include Dye coupled toners in his books.