>>10060065Ideally you want both. IIRC some Classifieds work in both for a decent range. And the cut waists are legitimately pointless. If you use them at all, the figure looks completely retarded.
Ironically one of the best uses of a single-axis crunch on a figure was the Sugimori-styled drawing reference Figuarts, which has a balljoint at the chest and waist and then a hinge in the middle of the torso. Obviously that's a blank figure for artists or customizers, but the point stands.