i would throw a shakey head if the fish need to be finessed or i want to throw a smaller plastic like a finnese worm or any smaller plstic you cant put on a worm hook. i throw t-rigs when i want to throw bigger baits or throwing into heavy cover for bigger fish
I drop shot when fish are inactive. I can keep the bait in the strike zone as long as it takes to get a bite. I drop shot in any depth from 2' to 30'...