For deep dredging/high sticking, I typically leave my butt section (a foot or so). Then straight to 1x or 2x for about 5-6 ft. Finish off with a foot of tippet (3x, 4x, or 5x for me, usually depending on what size fly I'm using). If a dropper is to be used, I leave a tag end on the 1x or 2x where it meets the tippet.
That's not really a tapered leader, per se, just flat mono, which is how I like it for high sticking.
For shallower nymphing, I usually just use my dry fly leader and dry-dropper it.