|South Amphitheater Pinnacle
It's too bad that this route was put in the book, as its inclusion increases the odds that someone will feel compelled to do it to "tick" the route. Save for that, it has little to recommend it. Climb up the North end of the rock that can be seen from the Gregory Canyon trail, following whatever solid spots you can find and compromising on piles of choss between. The summit is nice, and you can go down via the South Ridge, which is much nicer.
This climb roughly climbs the North Ridge of the S. Gregory Pinnacle. It starts on the left (East) and finishes on the right (West) side of that ridge and uses whatever solid rock you can find in between.
Lots of loose rock, an occasional piece can be placed in solid cracks, perhaps medium/hands-sized cams will be the best when available.