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.

Use the totem legendary to give your green circle cc immunity. Deploy to heal and hop inside when the grumpy bomb is near you. Grumpy bomb does little damage so the totem essentially negates 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.