Kunan,

Keith summed it up real well. To add, I almost always go with a jet diver first, lead dropper second. I try to use the lightest mainline possible to lesson the line drag from the current. Faster water, less need to go light. Be sure and add additional scent to your bait wrap as well. We either inject them, butter them, or both. We also change them fairly often.

Good luck,

Steve