This game has some weird things.

[Dhex]

Think they wanted to just turn off other's SCT, not their own.

Chocobo's names are tied to Players.

Rest is pretty bang on, though, occasionally you'll get that one caster mob aggro'd to ya way off to the side that you're choosing to ignore (due to CC or it's a weak enemy) anyway that it keeps tabbing to. >.O lol Which the Tab Target Filters sadly don't help with. No ignore CC option T_T

You can switch TAB to Cycle Targets Nearest to Farthest, Cycle Targets Farthest to Nearest, or in it's default it will Target the Nearest enemy based on the alphabetical order available. It can be changed and adjusted.

Personally my directional keys are my target system Left arrow for Near to Far, Right arrow for Far to Near, Up arrow for Target nearest Enemy, and Down arrow for lock-on. Pg up is Cycle Up Through Enmity list, Pg. down is Cycle Down Through Enmity list.

Only using TAB to target is fine but there are a multitude of Targeting keybind settings that you can use to fine tune and adjust how you cycle through your targets.