I use to use a top-shot for spooky Reds and Trout, now I just use a 5-6 foot Seaguar Flurocarbon leader.
Now Mr. Snooky is a different story altogether, Ande 16 lb, tourney line, Bimini twist (25-40 turns) and 15-20 feet of 40-60 lb Seaguar fluro leader for live baiting. When throwing plugs, spoons, and shallow runners or soft bodies to Mr. Snooky I drop down to 20-25 lb leader.