IMHO, Same as anything else, try different approaches until you get bites...start off with it sitting still, current will move a good bait...if nothing bites, give it alittle movement, with twitches, etc...then let it sit.
I like the bottom bait 2 ft from the weight, then I add a second 18 inches up, to cover more water column...I have been catching fish equally on both.
My setup differs from most that I use "hyper snaps and swivels" and light jig heads and swimmers...this way I can adjust this quickly if needed.
Good fishing
Brent