Be advised....It depends on the time of year as to any decoy. Forstly, the Scarface is a rather large deer, meaning if your in search of an 8 point, you may not want to take the chance of ol scarry turning him out. Dominance prevails and there will likely be no challenge from less dominant bucks. During rut you may want to go with a doe or a antler removable buck, positioned with tail towards you, this will hae the bucks approach from the rear, giving you a shot.
I have done alot of reserch, and asked alot of questions; some on this forum, and the feedback comes back to the same answer, KILL.
good luck and happy hunting.