DoW
Right face buttons: single-target combo
Expanded right face buttons: AoE combo (not used/alternated in a lot of encounters)
Left + expanded left face buttons: buffs (damage/lower CD buffs on the first bar)
Left + expanded left d-pad: more-situational actions (especially tank role actions)

DoM
Anything with a cast time generally goes on the d-pad while instant-casts go on the face buttons

Actions mapped to right or down on the d-pad are also easier to use on the move than up and left, otherwise you can just jump for those.