Golf Stroke Geometry does not change with the choice of Club. With the Ball positioned behind Low Point, Impact optimally will be Three-Dimensional, i.e., Down, Out and Forward. Impact occuring after Low Point will result in an Upstroke Motion and Compression Leakage (2-J-2).
Thanks for your advice Yoda! Your comments go contrary to what a lot of putting 'gurus' who don't understand the Three Dimensional Impact recommend -- a slightly ascending Clubhead after Impact which necessitates a ball position in front of Low Point. Although the price tag for Compression Leakage in putting isn’t as big as with hitting a driver, there’s still a price to pay!