Take a normal leader with 2 droppers, place a fly on the point, a split shot on the first dropper and a fly on the top dropper. If the split shot snags, it should pull straight off. This rig will keep the flies about 3-6 inches off the bottom.
Another version is to replace the point fly with a split shot and have flies on the droppers. This is basically a rig called a “drop shot”. Plenty on the web about this rig. Only difference is, the coarse boys fish it static and “jiggle” the lure in a spot before moving it on. It is used in rivers for Perch etc.
Failing the above, why not use a very heavy tungsten beaded fly as per our European friends?