I dont think height and angle make that big of diffrence. Most important to me is:

-Bend at the waist (dont drop bow arm)

-Aim for the lower third of the body on the oppisite side (aim for the exit hole)

-If using a range finder...if possible range straight across to a tree... not down. Use thr true distance from the base of the tree.

If you really want to know how this all affects you set a stand up in a tree, get on the roof, or pull a screen out of the second floor and practice.