I only make saltwater lures at this point and add nothing. I have tested a lot (oils and salts) and it hasn't proven to be a plus for me so far. Not even having a pail of fresh bloody bunker sitting on my deck for dunking lures. After using bunker oil I thought If I stepped it up with fresh snagged bloody bunker it might work. Not.
With out anything added the fish still kill them fishing side by side with others.
Even though match the hatch still applies to saltwater I find White to be the number one color for me in any area around the globe I've fished. I always have white lures of some kind when I'm fishing.
Taking giant jigs fishing? What kind of fish and where? If you were in New England I would tell you to use White, White w/red tail or vise versa. Blue, Pink, and Green.
I made a bunch of teasers I just tested Cod fishing. 3 foot up from the jig I tied one off. Picked up just as many fish on the teaser as the jig. Captain flipped and begged me for more.
For the teasers I just took some Mr. Twister type grubs I made in white and then re dipped the tails in red. Dip the tail twice and hang it off a table to dry. It straightens them out. Like crack to the Cod, Haddock, and Pollock.
Can't tell you how many Stripers have holes in there lips in the last month for my lures. Dozens this past weekend alone. White, white with pink heads and tails, and white belly gun metal or black tops. Night I have no need for any color but black for any fish anywhere.