There's 4 different "tab" styles in the game.
My suggestion is to mix up 2 of the 4.
There is a basic "target nearest thing im facing" but it does NOT actually tab through the targets. Pressing again is the confirm button to attack.
Press this to target the nearest mob. Then press the left, or the right, tab target buttons, to tab to the next mob to the left/right of ur current target.
If you dont target ur 1st mob before left/right, u end up targeting mobs on the far left/right of ur screen instead.
This is roughly based on how FFXI did it, but with more button presses, and less effective. In FFXI the left/right ONLY target mobs left/right of u, and starts in the front of u, with the nearest mob. Here left/right dont do that, and instead u have to press the confirm button to start it off, adding 1 extra button to press.
So it was better in XI where it was possible to select the correct target with a single push, even if there were 50 mobs. here its roughly 2 presses, and even then, sometimes it can be janky 1 in 10 times, selecting a mob slightly more left/right of the target thats actually just left/right of the current target.
there is an option for a "cone" system, almost similar to what ur talking about, but its based on camera, not ur character. and the default option has the cone option turned off.
i dont suggest either of these, as they are completely random, and theres no real predictable way to select the correct target in 2 or less button presses, w/o complete luck. (Personally hated WoW and its clones for this purpose, nearly 33-50% of the time 2 presses wasnt enough to target a mob thats the 3rd furthest way. and it would require 3-5 presses, and felt kinda random, were as it felt better to always select the correct target in a single button press in XI (2 in XIV))
Yes, but im not able to get into game atm to be able to tell u the steps correctly.