Turrets. They're the bane of many Overwatch players' existence. While a solid Genji, D.Va or Widowmaker (or two) can negate them, there's also something to be said for more vengeful tactics. Fallout Plays put together a team configuration that tears through turrets on levels like Hanamura. It's damn satisfying to watch, in a way where, if you're certain nobody else is around, you might be tempted to yell FUCK YOU FUCK YOU FUCK YOU HAHAHAHA at your screen or maybe even to a real live bird if you've got one handy.
Basically, you want at least one (though preferably two) Lucios and four Zaryas. Lucio speeds everybody up so they're hard for turrets to track, and the Zaryas use their shields to negate significant amounts of damage.
Bonus: Since turrets tend to just kinda spray at whatever moves, they will hit Zarya's shield, immediately boosting her weapon's damage through the roof. Once on the point, you turn the whole thing into a patchwork hell of buffed laser beams. Then you rush to the next point and repeat the same strategy.
This allowed the Fallout Plays folks to win a whole round in under two minutes. It also brought them the greatest gift of all: Laughter... at somebody else's expense.