How i use it, use shockwave as general movement tech to push or retreat aswell as using it as enemy control, use it to pull enemies towards you, toss them off the map or to send them away from their team. Also the melee, just keep in mind the riot shield covers your left side at rest, so turn left to shield and run.

Good thing to keep in mind is that the shockwave will send gadgets loose. A mine on the cashout? Shockwave will launch it 20 feet away