Hitting a flop shot off a tight lie requires that you attack the ball with a steeper swing and open clubface so that the club gets under the ball and pops it up softly
Draw an umbrella in the sand and get your divots to start to the target side of the handle to stop falling back and trying to help the ball out of the bunker
Club trajectory is severely affected on downhill shots. Take a more lofted club, adjust your weight and chase your swing down the hill