Nose hook for open water and T-rig it when you have enough cover to be worried about snagging up or heavy weed/algae bloom. Palmar knot, make sure the loop always comes up under the hook. If it goes over instead of under, getting properly set hook is difficult. Once you tighten the knot down, bring the tag end back through the eye downwards. This keeps the hook standing upright, anything but a horizontal hook is no good.
Fishing DS depends on how the fish want it. I usually start by letting it drop, then lift and fall the bait itself without moving the weight a couple times. I usually shake a DS back to me, giving it a couple drags. In deep water over structure, you can just throw it out and drag it behind the boat a bit. Sometimes the fish want you to throw out and just deadstick the bait for half a minute before moving it. Sometimes, if you want to cover water, bump up your weight and using a drag/hop retrieve. Using a bigger weight allows you get down faster and cover more water, whereas a ligther weight excels in shallower water or when you need to fish super slow with 4-6lb line