Hattick,
The name of the game for predictable and repeatable accuracy is "sameness"; being able to duplicate [your] shot...shot after shot. If using a kisser helps you to achieve a consistant anchor, then by all means use it. If you choose to give it a try, do your experimentation on a blank bale. Do not concern yourself with aiming but rather the mechanics of your shot and the feel of the kisser. You cannot be aiming and working on form issues, kisser placement/feel etc and expect reasonably good accuracy.
BTW....I have a good friend who uses a kisser on his recurve with deadly accuracy!!! It works!!