Flat-waxed, doubled, would probably work fine. I tied a few using Uni-stretch and was happy with the results (haven’t fished them yet, so…); that stuff retains it’s color very well when wet.
Spent 15 minutes drifting a Czech nymph (which had been very effective on this section for the past hour) over what looked like a pretty good trout and not even a look. With all the baetis that have been up and about, decided to see what Shep (pink hotspot) could do - first cast hooked what turned out to be a very nice-sized whitefish (sorry, didn’t get a pic but who’s going to lie about whitefish?). Proceeded to catch 3 more in the next 5 minutes before I popped it off on #5. This fly may become my go-to tailwater whitefish fly. BTW, it seems to work on trout, too; lost another one on a nice brown later that afternoon.