Braid
If you use a shorter rod 6 to 6'6,I would recomend braid as my main line mono as the leader line,especially if you are short or don't have a strong hookset. When you set the hook carolina rigging you should use a long sweeping set and a high speed reel. reason being, you have to pick up the sinker and drive the hook in from a fairly far distance.If you use a longer rod 7' or longer I would recomend mono reason being the longer rod will load up on the hook set and with the stored energy you will have a sufficent
hookset.Don't forget when the rod is at the top of its hookset start reeling to pick up that slack that will come from the sweeping hookset as you bring your rod foward to control the fish.
The combo that I use is a 7 ft Kessler medium action rod, with a very, very, fast tip, with a calais high speed reel,14 lb clear blue stren, and 10 lb clear blue as my leader line.I'm sure there are many other great combos that work great,but for my size this works really good for me even though I may start expermenting with a 8'rod.
Hope this helps I know its more then what you were asking for but I had a couple of extra minutes so I thought I would give you a couple of extra hints/ideas.
Darryl