Animation Optimization: Shoulders, hips, neck?

So I’m fairly certain that the model I’ve got has a nice poly count and some good edge flow, however, when it comes to animation I’ve only seen how to model joints. For something that rotates and bends, like a socket, what is the best way to optimize the joint?

EDIT: forgot to attach my model file.

Also, is there anything you’d recommend for making my model more “efficient”? I’m shooting for something that Xbox 360 can render fairly fast.


lab_overseeer(animation ready).blend (646 KB)