Put together a barb set a few days ago after not playing him for months. I can handle MP10 fine with very few deaths (maybe once every few runs) and perma-wrath without issue. With my DPS though, elites take too long. Play for fun, not necessarily for max efficiency.
I know lots of people use overpower-killing spree, but it seems to me the 35% damage reduction from crushing advance is way more useful than the 10 CC. Seems to me I could get 10% cc equivalent dps much easier than 35% damage reduction.
Any suggestions on upgrade path?
You need 30-60 avg damage on all your jewelry. You also need to start stacking more str which will come from chest, boots, ring, ammy.
IMO, you should aim to gear so that you don't need any defensive active skills. OPCA is a crutch for playing too high MP for your gear. Just use OPKS, drop the MP and kill things faster. If you think getting 10cc on gear is easy, you must find good deals on AH cuz it ain't cheap.