I mean while they're preoccupied. Whether they're sniping or shooting at someone else. Use it around corners. People who run with snipers have a hard time picking off a charging titan when they're jumping everywhere. I checked my crucible stats recently and my melee contributes for the second greatest source of my kills (following scout rifles). And guess where most of these melees come from. Shoulder charge. It's no gimmick. It truly is an amazing ability. It works anywhere, and my friend killed three people in one trials match with it today. Literally. He got wrecking ball from Shoulder charge alone. Those people were preoccupied between shooting me and our other player, and attempting to revive their fallen foes. He flanked them and ran away when they shot at him only to pull a 180 and finish them off. He played smart and it rewarded him. Many people I know who run titan have great success with shoulder charge. I don't know why you refuse to see that.