Arc Grenades, shoulder charge (it's a very situational ability, though) and Fist of Havoc are what makes a Striker excellent. Stick the Arc grenades on to walls to flush enemies and control flags and try to save your Fist of Havoc for multi kills, Control point captures and killing Bladedancers. Plus, you gotta pack some good gear and get good at gunplay. You'll be stomping pubs in no time.