That depends on how deep were talking
For less than 200' I use a triple swivel rig, varying leader length on desired species.
For 200-300 feet I use a L-bar to keep the bait away from the main line while dopping.
For more than 300' I use the standard deep drop rig with 2 hooks and longer droppers 8-20". When I do this I use a rig 8' long with the baits spaced so they never touch the swivel, weight, or each other, to keep from being tangled. On this rig I use much bigger hooks then normal, because the bait dosen't swim much anyways, and you'll have a much better hook up ratio.
Kyle