Downriggers are obviously the most proficient way to work the thermocline effectively. They put you at the exact depth you require and with downriggers, you can fish multiple rods and lures at the same time.
Many anglers have no true idea of the effectiveness of a metal jig. If they did, jigging would far-outnumber all other techniques. Three critical steps to out-fishing the competition by vertically jigging the Sonic BaitFish (SBF).