You know tc the only fly I've tied with a jig hook is a slump buster. But I like this fly very much and plan on tying some. I like the variant concept and all its possibilities like even an all black stonefly? By the way why is olive dun your favorite color thread right now?
This is definitely a great pattern, and one I recommend. Your inclusion of the black stonefly shows the versatility of the fly, and there are many effective color combinations out there. You do not have to tie it on a jig hook, though I have been tying many subsurface patterns on them in the last couple years, and have been pleased with the results (especially when fishing the pattern deep). As for the thread, I have been using that color on so many patterns, and it has just the right amount of brown or olive in it, depending on which color I need. It has become my "go-to" thread for nearly all nymphs, with the exception of those that are mainly black.