To be honest, effective use of Aetherial Manipulation has less to do with macros (I use a gamepad) and more to do with strong situational awareness. You just need to be cognizant of which party members are where, and as the attack is coming in, make that split second decision of who to target. There is almost nothing wrong with the skill (although the 4.2 buff was very welcomed), and while Blink would be nice, I vastly prefer Aetherial Manipulation.