360 Degree Spin Causing Knockback, Appropriate Approach Please.

[ShikamaruShadow]

Can someone suggest to me the appropriate and optimized way of creating a 360 degree knockback from someone who is stationary? I created a trigger for it, but if too many enemies (30+) are involved it causes fatal errors. Also if you could recommend a special effect to go with the knockbacked enemy that doesn't lag, it would be appreciated. The knockback would increase how far the enemy is pushed back in increments of four levels