Performers card should be like
Increase reverb damage (150% or whatever its doing now) AND allow notes to trigger in a 3x3 area like traps do, as well as Reverberation NOT split its damage like blitz beat (making it useless for mobbing currently)
increase metallic damage by nothing, but instead reduce its SP cost by 70% and increase the damage the damage of 'neutral' elemental magic by 200% if worn by a wanderer or maestro class (this will triple its current damage multiplicatively instead of additively with sound amps).