If your jigging for cusk, I would use a white or glow in the dark bucktail with cut sucker meat (not rotten) or tipped with smelt.
If your using cusk lines, I would use live bait be it big shiners, smelt or suckers. Thread your line through the tail meat section, pull your line through and hook your bait behind the head. The cusk will take your bait head first and cant remove your bait from the sewn on line.
Good Luck,
JIGGIN.