Only real problem I have with overload champions are smgs not having enough rounds in the mag. Well that and the captain in the fallen lost sector on europa. The one who is in the same room as the anti barrier servitor. Regardless of what you do he continues to shoot at you. Even when stunned. If you're running stormtrance, then equip the mod from artifact that gives arc grenades overload. Run pulse nades and if you miss chances are the champion will just teleport right into it. Edit: also about rocket launchers, didnt they split the damage on rockets with cluster bombs? Your using the wrong one grab one with lasting impression.