I use a 50lb class rod, with an Abu 7500, Berkeley Big Game 60lb Line onto a 15ft Rubbing trace of 200lb mono, because the Porbeagles skin is so rough he will snap anything lighter if he gets twisted in it, onto the rubbing leader is a wire trace and a 10/0 O'Shaughnessey Hook with a mackerel flapper on the end, everything is linked with 500lb Big Game swivels. And a balloon for a float.
For Rubby Dubby I use chopped mackerel, scad or whatever is about, mixed with pilchard oil or any fish oil.