When you matchmake on the daily vanguard strike and kick ayass. Just a natural 'you get it' team mate without need for mic or discussion, just awareness and intelligence (or common sense)! Flip side, when both the other fireteam members quit at boss you know you're in for a slog. Had this today and got boss down to a quarter health but waves of adds got ridiculous, then..... x and x have joined fireteam! Boom! You beautiful guardians! Smashed remainder of waves and health in no time!