Their's a lot others have said, but from me, use your super at the right time. Try doing this in 3v3 playlists, especially Trials/Elimination where super really matter. A Striker's Fist of Havoc should be used when another super (a mobile super specifically) is on sight, so Sunbreakers, Bladedancers, Radiance, and Stormtrance. As for Golden Gun, you better pray. Other situations may be when you see a group of three or more people crowded up together. It's risk/reward when attempting to smash them. Another time is before heavy drops. Either rush and destroy everyone who is next to the heavy, thus claiming it, or hide and strike. Try using an Insturmoutable Skullfort, ACD/0 Feedback Fence, or the Helm of Inmost Light as those are all Striker specific exotics that can be useful.