I have like 13k dps,45k hp,1000res to all- I also have string of ears. And still he hits me like a truck. Also have a defensive build.
If yes try this build: http://eu.battle.net/d3/en/calculator/barbarian#WVXRUk!bVU!ccaZZc
If no get some LOH pieces! :D
The tornadoes tick like 2-3 times per second and does a very good amount of healing especialyl because you can run around him having 4 tornadoes hit at the same time+some extra kiting if needed.
And I have way to low dps to zerg him. Guess I need a DH or something to boost me, derp.
You can kill diablo before you can kill him so stupid....