The Eden set is more trouble than it seems. Sure, you're invincible whenever you have the Light Puck, but it steals five slots from your pins, and if you're using a healing pin to make up for your partner's getting beat up, that puck isn't going to last very long at all with a low 1.1x multiplier, since Neku will be completely unable to attack at all. Not to mention Taboo Noise will take an eternity to down, since you need the Light Puck to do any appreciable damage on the enemy.
LASS is a much better alternative, though it will require Neku to not only grind Bravery, but wear goth loli clothes.