Yes, numerous times. Have also climbed Iroquois from trail. Descent should take < 40 min. even w/ time to smell the roses on Shepard's tooth. There's a herd path down to Shepard's tooth, From there find a fault line just to it's W & follow it down to trail. You may encounter some cliffs just before reaching trail. If so contour W around them & should hit trail w/in few ft of cairn marking ascent path to Marshall.
Great rte to use to get entire MacIntyre range in one hike. Enjoy !