Have you thought about tying it as a tube fly. It has some similarity to some shark flies I tie with the trailing hook. I like tube flies in this setup because I can snell the hook directly to the bite tippet rather than tying an internal knot to a hook shank. I think you get a more secure connection and better feel. Here is a picture of one of my shark flies. The hook is pulled out slightly so you can see the snell on the hook.
Yeah, I know. For the most part it makes more sense to tie these as tubes in the first place. I’ve actually been fishing tubes probably half the time down here for a couple of years now. For some reason, I guess I just go through phases; I attracted to these flies at the moment. I don’t usually end up tying an internal knot to the hook shank though, but snell through the eye of both hooks and then just wrap the tag ends to the cut off shank. Seems to work fine and I’ve not had any pull loose on me. We did a five day float on the Limay last month and got plenty of monster browns on them with no issues.