You might try a small jig tipped with a single spike; I would use a 3mm gold for starters. Then I would try a small Ratso or Shrimpo, both tipped and untipped. If you are still seeing fish you might try a Spoon or Swimming lure with a dropper and a tiny hook buried in a spike or wax worm. Also if you didn't already, go to 2# Flourocarbon on at least one rig. I've used the Arnold Fairy jigs, and they do make nice custom dropper rigs. My favorite is a size 16 scud hook from the fly tying bench, on a 4-6'' drop.