It really isn't hard to fix frontlines...

[Gurgeh]

Sadly it's quite an hassle to tab-rotate through targets and hope that it lands on what you desired.

And trying to click the specific target isn't that easy either when there's 70 of them on screen.

YEah controller has the advantage here.
Although.... There probably is something similar you can do for mouse.
I use

• Movement Settings: 'Legacy Type'
  Auto-target according to priority - 'Line of Sight'
  Enable full auto target
  Target Closest enemies Type 2: Cone

Controller now has auto select and commit action if nothing at all targeted (surely mouse and key board has some similar)
I very rarely use tab targetting in PvP
Its line of sight-cone , select. And deselect and try again on the rare occasions I get the previous wrong.
I play didstance WHM, and PLD mele. Works for both.
My targeting is pretty impeccable. Certainly passable.