Down here in Ga. most everyone I've talked with use 6 or 8# mono line in hi-vis for longlining. The hi-vis helps me with seeing the lines out the back of the boat when another line has to be casted back into position and is also easier watching the line with the fish on it trying to keep it from tangling other lines when reel in the fish. IMO clear or hi vis doesnt matter to the fish as they'll bite both. I only use 1/16th jigs and 1/32nd jigs for longlining. From watching the graph and finding where the fish are suspending you can get jigs in the fishes faces by casting short lines, adding splitshots, etc. to get the depths of your jigs where you wnt 'em. Some of the members onboard also make what they call light wire hooks on their jigs too. It may cost you a big striper using those wire hooks but it certainly help to avoid some of the break offs when you snag something on bottom when trolling by being able to pull the hooks straight. I've never shot docks so all I can tell ya is I've read where some will go as light as a 1/64th jighead all the way up to a 1/16th and theyre reporting some nice catches.
Health nuts are going to feel stupid someday, lying in hospitals dying of nothing.