Regarding Key Binding on a controller

[HEC]

You can actually select targets using L1 / R1 while the crossbar is up - e.g. if you hold L2 or R2 at the same time (which is a bit akward) or if you'd change the crossbar mode to toggle / mixed mode at which point you'll simply tap L2 or R2 to bring up (if hidden) / active one of the crossbars and then you can not only use all the action buttons without holding L2 or R2 but also use L1 / R1 to scroll quickly between enemy targets. In the character configuration screen you can also specify / customize which targets should be selectable at which situations.

bumpity bump bump

And just FYI - this is against forum rules.