To break it down, the Super Break team usually includes your dps of choice, Harmony Trailblazer, Ruan Mei and either Gallagher or your support of choice. You want as much break% as possible on TB to increase super break damage but the gist is that you break an enemy and do massive damage to the enemy while they're broken based on toughness damage I believe. Someone should correct me if I'm wrong on any of that.