i use a 1/16th or a 1/32 both work good for me. when i shoot it after it hits the water i'll leave the bail open for a second or 2 so it drops deeper if needed and retrive slow. but i like the lighter jigs and have no problem getting them to the back of the dock. i use 4lb test line all the time and 1/32 seem to do good with that.
hope this helps