I'm no pro and matter of fact I've never even tried it. On the hand, I have seen it done and have read about. I think the speed should between 1 1/2 and 2 mph. You do not pull jigs at the same time unless you wished to tie a trailer line on the back hook of the crank bait. Like jig trolling, depth depends on the fishes depth. You want your baits just above them. Length of line out, diameter of line (# test), size of lip on crank bait, and body size of crank bait all contribute to the depth the bait runs. Experimentation is the only true way to home in on those variables.