The beauty of the Liathach traverse is you can either take the pinnacles direct or miss them out according to whim and conditions.
Approaching from the East the fist section is the hardest - you come to the col after the main summit and then the entry onto the first pinnacle is guarded by a section that is a bit like walking along a 10 foot ironing board with a 1000 foot drop either side. If it's too windy or it freaks you then straddle it and go "a cheval" with a leg either side! Getting onto the second pinnacle from here is fine but the descent to the gap between 2+3 is tricky. There is an avoiding path (unfeasable in winter under snow but should be ok in may on the s side.
Be sure to take the little detour out onto the top of Bell's Buttress. I had a photo of me with a Brocken Spectre here but sadly not on my hard drive.
After the second pinnacle things get a bit easier over the third and fourth. The avoiding path continues under these but you can join the the crest no problem after the second. The rock is helpfully grippy but the situations are very exposed.
Technically the scrambling is harder than anything on Crib Goch, or CMD Arete, and it's more exposed.
But you have options!
You'll find quite a few pics of Liathach on my site, link below.
Hope this helps.
Ian
www.mountainfreedom.co.uk