The short answer is I installed soffit baffles and sealed over the central hallway which was a huge thermal bypass. Then we had ~15" of cellulose blown in to the attic. I did take photos, but given how low the roof is, they aren't very exciting shots. But here is one -
The longer version of the story is here -
Cellulose Insulated Attic Makes For a Cozy Home | EcoNewMexico.com