I've been fishing the dry and nymph combo a lot with the dry attached to tippet and then another tippet tied with a clinch knot from the hook to a dropper nymph with another nymph. I'm really new to fly fishing so I'm not to most knowledgable with knots, but I've used an orvis knot on the dropper too, and they both seemed pretty well. I usually use the clinch knot b/c I find it easier to tie with the 6x tippet which reminds me of trying to tie spider web. I've used both knots a lot with blueguill on local lakes and haven't had any break off's with either not. I haven't tried leaving the tag end long though. That may put some extra stress on the not, but I'm not sure. An 18" brown in a strong fish too.
"I've got to stop wishin, I've got to go fishin"