Fishseeker divers are about the best I've found for diving baits deep while trolling. They are depth adjustable, and don't stress the rod nearly as much as the jet diver or hellbenders do. Only drawback with them is, you have to run about a 3' leader and go less that 3.5-4mph or they'll tip over.
I'm gonna try the three way swivel and D22 though. I could see that being very productive at times.
If you're not living on the edge, you're taking up too much space!