If I am using a LW, or any wedge, I use a neutral grip or I even open up the clubface.
I place the ball in the middle of my stance for a 3/4 swing or just one ball to the right (right handed player) for a pitch.
My weight is even on both feet for a 3/4 swing and more on the left for a pitch.
3/4 swing I am square but for a pitch, I have an open stance.
I accelerate through the swing and hit down upon ball.
A few months ago, prior to some lessons, I was swinging the club and it was going under the ball.It went from my disaster/low percentage shot to my scoring shot.
I also use an
undercut cavity wedge over the old blade wedge for more consistency with off centered shots.
Golf Training Tip: Hitting the Lob Wedge - Associated Content
GOLFONLINE - Why You Need a Lob Wedge
Golf Swing Instructions - How To Hit The Lob Wedge