Shock pulse his turrets, they are a stationary target basically a guaranteed bounce if anyone is near by.

her wall is a deployable so using shock pulse on it will damage and slow those around it.

The shield can be used to interrupt his lock on attack. Best used in the beginning of a fight as he can't siphon higher shields then he already has at full health.

The shield can provide cover from grumpy bomb allowing you to avoid the stun.