Try tying a spin off of Scott Howell's Prom Dress (Flashabou), the Prom Dress Intruder. Howell's Prom Dress is tied in one front stage only and has a Polar dubbing, Polar Bear under collar. Add a rear stage and you have a Prom Dress Intruder. I tie my Prom Dress Intruder out of nothing but synthetics, substituting Lite Bright dubbing, Polar Chenille for the Polar dubbing, Polar Bear. I also substitute New Age Chenille (body), a dub looped Angel Hair finish collar for Howell's flat tinsel (body) and Guinea finish collar. Use all material sparsely, especially for the Prom Dress Intruder. I use a lot less Flashabou that is showed on most of the Prom Dress flies and shorten it up a bit for the Prom Dress Intruder because the Flashabou is in two stages.

In doing so, It soaks up very little water, cast well, sinks well and fishes well.

It has become one of my favorite Intruder patterns and the materials to tie it are fairly cheap.

http://www.flyfishusa.com/flies/stl-prom-dress.htm

http://www.flytyingbug.com/threads/protube-prom-dress-w-step-by-step.452/

http://www.flyfishusa.com/newsletter/022811/

http://oregonflyfishingblog.com/2011/01/24/blue-hoochi-tube-fly-video/

http://www.youtube.com/watch?v=jTnLZJIcEFc

GG