I have not used many synthetics at all. Simply because, as I already pointed out, I don't know how to. The dubbing on various flies particular flies has to be exactly right in order to work properly. Incorrect mixtures will not be as successful, although some may work anyway.
Since somebody asked, that is a "creeper", dressed in this case with dark green mohair;
“The “creeper” was the name used for large stoneflies, which were often used as bait. Many authors, including Stewart used these.
http://archive.org/stream/practicalangl ... ch/creeper
http://archive.org/stream/practicalangl ... ch/creeper
I knew a couple of people who used very rough imitations of these flies, and caught a lot of fish on them. Indeed, I think this may have been the forerunner of the woolly bugger! The flies are quite simple, a long shank hook ( Size 8 LS Hook shown here ) about an inch long is wound with lead, and then overwound with wool of the appropriate colour, and then ribbed with tinsel or wire. Often dark green was used, but I have also seen brown and black variations and some mixtures. These flies were also used in various sizes as “sheet anchors” on various working rigs
This is a well used example from one of my boxes. As you can see, it looks very much like a very simple Woolly bugger! When I dress these things now, I brush the wool ( it is mohair wool) out well, after dressing the fly. These flies are quite deadly on grayling. But will of course also take trout. I knew one old guy who used nothing else, and he caught a huge number of fish! On reflection, I recollect that this is why I made the Green Tailed Woolly Bugger!
http://archive.org/stream/northernangle ... 6/mode/2up
http://archive.org/stream/northernangle ... 0/mode/2up