I like the pump drill and have used it for years, since it looks a little odd as a preshot routine, you might want to visualize the handle of the club coming down the target line or a little left or right, whatever is comfortable. When using this visualization, keep the hands soft so the release can happen.
This visualization does several things, it keeps you down and through the shot, it forces you to have hands ahead leading into impact, and, it takes all the mental thinking down to a minimum.
I even use it on pitches.
The only club I tend not to use this thought is with the driver, for driver, I like to just take it slow to finish the backswing; most slicers never truly feel the hinge or finish the backswing which has them coming either across the ball/impact with open clubface or they lift up and out of the shot because they know they are lacking power.
Hope this helps.