I have a fly that has worked well in Clear Lake, CA that I hope you can try. Marabou tail, 3/4 length of shank. Add a bit of flash if desired. Main body; loose dubbing of MS Bugger from Fly Tyers Dungeon. This has 1 inch fibers and hundreds of thin, very alive rubber strands. For bigger body, more of a streamer, tie in short bunches almost like a hitie. Use some velcro to brush fibers out, especially if you dubbed. Use weight if desired for deep, but will almost hover if no weight used. I tie in olive,green, brown and black. If long marabou tail isn't working, pinch it short and fish as a dragon fly. Bulky and brown look like a sculpin.