Use a 1" or <2" Curly tail grub on a small mini jig. White works very well for visibility. Use polarized glasses. When you see the white disappear, set the hook, don't wait until you feel the bite. I use 1/100th or 1/80th oz. jigheads. I've found them in Cabelas.
90% of the time I use them unpainted. Thread the curly tail grub on the hook, aligning the seam mark in the grub with the bend of the hook. I prefer to have the curly tail going straight up. If it's to one side or the other, the jig will swim to the left or the right, depending which way you missed threading it on perfectly "up".
I've found that Mr. Twister brand of scented curly tails and mini-crawfish outfish the Berkley power baits by a small margin, but both outfish the non-scented versions by a large margin. If you can find them, the mini-crawfish and nymphs seem to outfish the curly tail grubs.
