The Target Type 2 Cone (For Tab Targeting) - Mystery Solved

[Rongway]

Its still bad, because the target in the cone is selected randomly and not by distance.
When you have multiple targets inside the cone it often gives you an enemy far in the back you can't even reach instead of somethign right infront of you.

If you are trying to attack something right in front of you, you should be using the Target Nearest Enemy keybind, not tab targeting.