Practice,Rotations, and DPS

[MPK]

Mostly memorization. You'll get to a point where you'll know which action to use at each mechanic. It'll come naturally with practice.

Just hop into an EX learning party once you've memorized your opener and rotation. Everyone starts from somewhere, don't worry too much about letting your team down, the dps check for the current EX isn't even that bad most groups skip the last few mechanics anyways.