In reply to leon:
This is a timely post, because I recently re-acquainted myself with this very route - an experience which raised many more questions than answers!
Cruel Sister was my first ever E3, way back in 1980. On that occasion, a combination of psyche, burning desire and teenage gung ho propelled me - on sight - up that wall in a jiffy, and my memories of the experience are somewhat hazy.
The end of September 2013 saw me return to Pavey on a perfect autumn day, the first time I'd been back there in years.
After acquainting myself with Capella (which I don't think had been excavated the last time I was at Pavey) we decided to try Cruel Sister.
After a few false starts, I found the key to the initial traverse onto the wall, which is actually relatively straightforward (if rather bold) once you find the correct level. This felt familiar, and you arrive on a good foothold beneath the peg.
The first thing which I didn't remember at all, was the precarious stretch up to clip the peg - though it is possible that peg had a situ sling on it back in 1980, as I think this was originally the case.
Anyway, I clipped it and got a backup nut to its left, and my impression of the peg (I didn't test it) was that it was absolutely fine. It showed no signs of rust, and certainly didn't look to me like it needed replacing.
But having got the peg clipped, I then found the next 20ft section completely confusing, and nothing like I remembered it. First of all I headed up and slightly left, following a fairly easy set of narrow shelves, until I was facing a precarious move up and right to an overlap. But that move looked hard, and I was way above the peg, so I reversed back down for a re-think. I then tried traversing right to the arête, on a line of thin undercuts at the back of an overlap, which seemed much harder than the wall I had just gone up and down, but had the advantage of being nearer the peg.
I stuck with the traverse and made it to the arête, where a couple of moves up a nut placement was spotted with some relief.
I moved up left towards the line of the upper crack, standing on thin footholds which had my chalk from my earlier attempt to climb direct.
The rest of the pitch went fine, but the whole experience was nothing like I remembered it!
I had a look on the UKC logbooks and discovered that at least one person had successfully climbed direct (ie. missing out the second traverse right) so clearly I'm not the only one confused by the line in recent years.
Here are some other random thoughts on Cruel Sister, which may or may not help you:-
1 - It is considerably more mossy than it was in 1980, and the line is not completely obvious (particularly if there is no chalk on it, as was the case at the end of September).
2 - The peg doesn't need replacing and the skyhook comment is both offputting and unnecessary. Most people don't carry skyhooks, and including references to obscure placements unearthed by those who do, in the descriptions of classic routes which have always traditionally been climbed with no such skulduggery, is an unwelcome trend.
3 - The second traverse right (from the peg, to the arête) if it follows the undercuts, is probably 6a. And if it doesn't follow the undercuts, just how do you do it?!
4 - Cruel Sister is a brilliant route, but in my recent encounter it felt very bold to me. Quite how I chose it for my first E3 and emerged unscathed from the experience, I will never know!
5- Modern climbers are probably a bunch of scaredy cats.
6 - Pavey Ark on a perfect autumnal afternoon is a lovely place to be....
Neil