I don't recall the stats on the Rivellon Guard Cuirass, but I think I had something better (I used the Rivellon Guard Leggings for awhile).
There are better sets later in the game, of course. The first set I used multiple pieces of was the mining guild set on level 16, which I used until I was level 28, and could use a better bow I had bought earlier; with the set bonuses reduced, other equipment became better (I had been holding on to stuff to check out eventually), and I ended up replacing everything.
I have most of the pieces of the Hunter set, and a couple others, so will have to check them out when I get the last ones.
