Quick question: I can't find where I saw this addressed but maybe my search terms are just bad.
As far as I recall, common wisdom with Frenzy was to use longer range weapon in offhand? I remember reading that if you used longer range in main hand, the offhand would whiff more often. I had been using two weapons with the same range on my Frenzy barb, and then switched to Dimension Blade (+1) and Zweihander (+2) in offhand and I feel like I'm missing more often, but it may just be a trick of the mind. EDIT: Was just a trick of mind. AR issues in general--fixed.