When playing a downhill lie, set your shoulders parallel to the slope and your spine perpendicular. The swing in as if you are chasing the ball down the hill. Choose one less club, choke down a bit and you’re ready fire. DO NOT TRY TO LOFT THIS SHOT!! Accept the fact that the golf ball will fly on a very low trajectory and run a good ways upon landing. Take a few rehearsals and swing up hill going back and DOWN THE HILL COMING DOWN. A regular 7-iron might fly like a 2-3 iron. Accept it and deal with it.