Friends and I have used jig Raps (and other winter tactics) many times in open water. We use high-tech style line - especially Spiderwire - tied directly to the lure to help reduce snag losses. Works for perch on the bay as well.

Another great presentation is a Swedish Pimple in open water. A modification that works especially well is to remove the treble hook and replace it with a Northland Tackle single hook stinger which is available in a 2" length with a clip on one end and a single hook. This short stinger allows the bait to swing away from the lure when the fish inhales it, without moving the entire lure. Results are better hook-ups and usually, more fish. The pimple is both an attractor and a weight. I really like anchoring over deep water perch with this rig.