As Conjurer i asked the same question on a facebook group 'FFXI to FFXIV' but that didn't give me a solution.
My problem is/was that i can't select people from a distance in in FATE's to cure them. The TAB-key just cycle through all enemies and skip all players and npcs. At first i used my mouse by clicking each person with low hp but since no one stand still like they used to do in FFXI it's an impossible mission.
It's to bad the game is in a maintenance so can't really tell atm what i did but i have made a change in the hotkey tab to select the person in front of me with using one of the two extra mouse buttons on my mouse. This works pretty well although you can't stand still and have to run right in the battle everytime. This makes healing a challenge so its fun but the chance you die is also somewhat bigger. :P