I'll say it one last time the target priority is based on the center of the camera during regular targeting. So where ever the center of your camera is at that time will target whoever in in the area regardless of distance. The Cone shape may work but I see now problem with the current set up either, once you know that your camera center is the Cross hair for targeting you can use that to aim and target any mob you want.. I feel like I need to make a youtube video just to demonstrate how to use the camera to your advantage when targeting... But if they add your cone targeting system I hope they leave the old system because I like aim targeting better then cycling through targets.