The Perplex silver modification does not have any obvious effect, and may be broken. It does not appear to reduce enemy attack score, and it does not appear to prevent enemies from activating their combat arts.
This Combat Art is a very effective mob killer if the modification Flux is taken. You must run around getting enemies on screen to notice you and then they will keep in pursuit. After you have a sizable group rounded up, release Flaring Nova, which makes a powerful AoE.
Although it is usually overlooked, The bronze mod Impulse (when taken with Stun) will provide double the chance to stun, which can be a saving grace when mobbed by monsters.
Pros and Cons
Useful for stunning opponents, if the right mods have been chosen