I was able to loot these the other night, thanks to a single group that took out Rhag`Zhezum. My wife was also able to loot the Glowing Orb Of Luclinite for her VT key quest... I have to say, these were a definate improvement for the hurricane chain sleeves that I was previously wearing, more AC as well as almost identicle stats.
Ssra is not more difficult than NToV, mainly because for the most part the mobs are single group killable. When you start getting into the high named mobs (Vyz'Dra the Cursed, Emperor Ssraeshza, etc) is where you will need an experienced and well balanced raid force.