A wishbone rig Mark II is an improved wishbone.  It uses a free moving boom between 2 beads and about an inch of really stiff line between two beads.  When you use this setup, the tangle problems with the original wishbone will be greatly reduced.  This works well off piers and harbors and works really well for whiting and flatties.  This allows two different baits to be fished closely together.  The downside is that it is hard to cast long distance and still snags on rocky ground.  

Pulley rigs also work well.  They work based on the fact that heavier weights will hang lower in the water.  The lead will go first when you cast and will lay on the bottom similar to a paternoster, but whenever you reel the fish in, the lead just tucks out of the way, making it less likely that it will get snagged on the way in.  The fish will also not feel that little tell tale resistance when it takes the bait.

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