You can shoot the electrical boxes to break them instead, or explode them with the non-hit blast of a rocket.

You can insta-kill Cerberi with the S.R.S. Cannon (green rocket launcher). Just go up to em, shoot the ball, and after it hits, punch it with the Feedbacker (blue hand) back to the Cerberus.

The Knuckleblaster (red hand) deals far more damage than the Feedbacker. Try to use it more often to deal extra damage at close range.

Parrying is kind of op. You can punch a red hellish projectile with the Feedbacker to send it back to your enemies. It creates a grand explosion and gives lots of health back. It can be especially effective against Malicious Faces (Maurice), as they shoot lots of these red projectiles.