I don't know anything, but what I've read in this thread, so this is all musing. :
I would guess that smaller amounts of organ meats would be consumed with larger amounts of muscle-meats. Wouldn't one kill be used for a while if in a smaller group? and having as much of as much of a kill as possible used to feed a larger one? Either way, you'd be using as much of the animal as you can (I would think.. unless there was some kind of surplus and easy hunting), and thusly consuming more muscle-meat then organ-meat.
So a sort of balance would be reached--organ-meats being in less quantity, but higher nutritional value; muscle-meats being in higher quantity, but lower nutritional value. Both provide energy, and I would think that you would get plenty of nutrients between the muscle-meats and the less-frequent organs.
But today, I would say it comes down to taste and what your body is asking for. Everyone has an individual balance that's optimum for them. It might mean all organ-meats; it might mean high-carbs via non-animal foods. Different ratios fit different people. Experimenting and listening to your body is really the only way to find out what fits your genetics and lifestyle.
All musing though, I don't know much about ANY of this
Here's a comment from BYV re organ-meats, showing that they actually discarded muscle-meats in times of plenty:-
"Organ meats favored in preference to muscle meats in hunter-gatherer diets. Observations of modern hunter-gatherers have shown that muscle meats (the leanest part of the animal) are least preferred, sometimes even being thrown away in times of plenty, in preference to the fattier portions. Eaten first are the organs such as brains, eyeballs, tongue, kidneys, bone marrow (high in monounsaturated fat), and storage fat areas such as mesenteric (gut) fat. (Even this gut fat is much less saturated in composition, however, than the kind of marbled fat found in the muscle meat of modern feedlot animals.) There is no reason to believe earlier hunter-gatherers would have been any different in these preferences, since other species of animals who eat other animals for food also follow the same general order of consumption." taken from:-
http://www.beyondveg.com/nicholson-w/hb/hb-interview1f.shtmlMy point is that the raw organ-meats would have been shared automatically after each kill, thus ensuring that everyone regularly ate organ-meats(though some societies would have forbade their slaves from getting organs, resulting in poorer health for the latter, no doubt). Since organ-meats contain anywhere from 10 to 100 times as many nutrients as muscle-meats in many cases, they are particularly relevant to people (such as most of us) who've incurred nutritional deficiencies from decades on virtually organ-meat-free diets.
Another consideration is that most RAFers simply do not get the opportunity to eat the whole animal(most have never eaten the fat behind the eyeballs, for example), so they need to make up for this by eating more fatty organs such as tongue etc.