Anyone who has listened to Homer's telephone conversation with Yoda back in the early 80s will know that Homer is loathe to give recommendations for one component being better than another! "All are equally good...you can obtain the correct alignments with any of the components.." or something like that . Frustrating when you want to be told which is the best one to use!!
Homer does tell us some things though, such as the "correct" alignments eg. wrist position ( right = bent/level/vertical - mid body swinger - left = flat level vertical) AND his preference for zero plane shift and/or turned shoulder plane. Whether you adopt these he leaves to a matter of personal preference.
My thoughts are that some components are dictated to the individual through anatomy. For example plane and plane shift.
Using level wirst alignment,standard grip, a golf shaft of correct length ( for numbered iron) and correct posture the golfer can only align the shaft on one plane. Now if you set up an inclined plane to this angle of shaft plane, drop the shaft and make a backswing pivot - now where does your trail shoulder lie in relation to the inclined plane?
If the inclined plane cuts through the trail shoulder you can use TSP and zero axis shift, if shoulder lies above plane then you must use single shift backswing to get to TSP.
"Let your anatomy dictate the components" - Does anybody agree ? comments please. I have recently taken Homer's advice and built an inclined plane!!