So I restat the Barb, as I had no idea what the plan was before, but it wasn't working. But first I actually did some research and figured out a build.
After re-stating and re-skilling for a combination of WW and Concentration, it is a genuine pleasure to play him. WW here, Leap Attack there, Conc for anything that needs one-on-one attention, Howl whenever things get too busy. BO is almost maxed, now I'll just have to decide on a weapon mastery. Any standard rule here? What kind of weapon optimizes best between WW and Conc? Myk passed me an Aldur's Rhythm before death; the 10% LL (and ML) combined with the other 10% LL I'm getting from the two pieces of Sigon's is lovely (not to forget the Cathan's ring).
I can now see why Barbarians are so frequently lauded as "fun to play".