Just roll the dice and slice. You could maybe also take a forecourt position and try to poach...cut off even a slightly floating groundstroke in the air with a volley. From the baseline, as I said, you need to slice to break the pattern. And you need to be able to keep the slice low so that it dies down on them before they can get to it. This will force them forward. Usually, if they are glued to the baseline, they won't use their feet and will try to reach for the slice producing a weak groundstroke which could then give you the opportunity to get to the net and finish the point. You often find top players hitting a slice and sneaking into the net when they sense the opponent is not going to attack the slice. Fed especially but I have noticed Nole do this once or twice lately too. Don't go for drops because they will see you going for it after a while and simply run it down.
From the point of view of S&V, I was watching highlights of an old Mardy Fish match the other day where he dragged Nole to 3 sets in 2011 and Fish often shortened the length of his volleys. When the volley is deep, then the opponent has a good look at the pass as long as he gets to the ball. A short volley (NOT a drop, mind you) forces the opponent to come forward and maybe they will only manage a chip. This puts the volleyer in a position of strength to finish (rather than having to fend off a strong passing shot).