Slow Death is very similar to spinner fishing. You need some type of weight to get it to the desired depth.
If the fish are on the bottom – use a bottom bouncer just heavy enough to reach the bottom where the line from your rod is going down at about a 45 degree angle.
If you are fishing suspended fish, you can use a Snap Weight (I would suggest a 20 foot leader) or a XPS Fish Weight (4 foot leader). You will have to use the right weight and dropper line length combination to get the Slow Death hooking running in the right depth in the water column. As was mentioned, run as many different setup as you legal can – trying to find the one that puts the bait in the feeding zone.