how heavy you go will depend where you're fishing for them too, this summer was my first season chasing jacks, got 2 avg sizers out of a handful of trips and could only seem to connect with lighter gear, runnin 15lb braid/15 or 20lb leader, 1/12th and lighter jighead and small bream size plastics.
tried crankbaits, surface lures, bigger plastics and pretty much every lure in the box on heavier gear and couldnt tempt, quite possibly something to do with the jacks in the area i fish for them.
one thing about them is the harder you push them the harder they pull, ive been bricked many times by being too enthusiastic with the drag whereas the ones i landed i took it easy and steered them away from structure instead of trying to yank them out.
havent chased on bait or livies yet but unweighted/very lightly weighted against the rocks would be my suggestion