After reading over the discussion again, just adding up the total cut is simplistic, because the width isn't taken into consideration.
Think of broadhead damage as taking place inside a cylinder. For example a 6 blade 1'' head would have a lot of total cut, but I doubt it would really do that much more damage than a 1'' 4 blade head, because you are cutting inside the same area (the 1'' cylinder is getting cut to pieces). However a two blade head makes a slit, or if it has a cut on contact tip an oval and could miss some tissue inside it's 2'' cylinder.
I'm an "equipment nut" too and I thinkthe 3 blade Spitfire ( 1 1/2'' 3 blade) seems like a good compromise between width of cut and slicing up the inside of the cylinder.