Psychic Frenzy

Psychic Frenzy is an Esper assault ability available at level 10.

Solo Melee Esper
The bread-and-butter of the Solo Melee Esper build, this skill gives the player mobility, a means to keep doing damage while kiting and dodging telegraphs, and, in higher levels, an aid to survivability by leeching health from enemies.

In fact, with enough life leech from AMPs and other sources like Spectral Swarm, an esper's survivability actually goes up the more enemies they fight, provided they are close together.

B-I-N-G-O Synergy
Where Psychic Frenzy truly shines is in conjunction with the AMP B-I-N-G-O. The AMP gives every critical hit a 33% chance to generate 2 Psi Points. As Psychic Frenzy hits multiple times in a short period, and each of the three blades has a chance to crit, a few lucky swings can bring a player up to 5 PP in less than 2 seconds.

Combined with other low damage, many hit abilities like Blade Dance, it is not unheard of for higher level espers to chain multiple 5 PP Finishers back-to-back.