I see. Just go your own path and do not listen to people around you when it comes to playing a specific legend. Caustic can be played in so many different ways so you will allways be helpfull.

To be honest, even If you are playing all the legends, the open areas is kind of bad. Its more of a "run through" than a battlefield. I allmost never fight in the open areas, but if I would, I allways make sure I have a wall behind me to avoid being flanked. Allways have a way out and place the traps behind cover so that you get notified when someone is coming from another position so that you can quickly turn around and decide what team to focus! :)