Welcome! Great first post.Some may question drawing a bow without an arrow on it because of the possibility of a dry fire,but your point is very well made.I suffered with target panic for quite a long time and through perseverence and a number of the methods you have referred to as well as shooting back tension only for over a year I overcame it.
I would also suggest to any one sufferring this malady that they relax,remember that it is supposed to be fun and with time and a relaxed mind they will prevail.