No matter how the premade organized roles and squads, the difference between the pick-up groups and premades was DPS. There were equal number of people failing/dying to simple mechanics, co-ordination was the same. The pick-up groups were so close to winning, the boss only had so little health left that maybe three more minutes would have given us breathing room. Build/rotations did not avail an obvious advantage over the pick-ups, as the premades were quite close to running out of time.