It depends. A safe answer might be, full length size everything, but then you have the people that don't do that right and then ask about head space problems. For most people that can read instructions, full length sizing is a very satisfactory solution.
Then, we have another "absolute" statement about neck sizing. The fact of the matter is I use bushing dies in some very hot chamberings, many cycles and have never had a problem and my brass is in excellent shape. So, there is no pat answer to questions like this if the hand loader knows what he is doing. And, hopefully, that includes everyone? BB