Depending on the armor value of level 80 items, it could very well be possible to skip thick hide in favor of Feral Aggression for the additional -AP. It should be on par with Demo shout, which means with talents it will negate CoR. 2/5 will be enough for non-CoR mobs as well, if you want to only invest 2 points.
War Pirate :: Talent tree Druid (full feral aggression)
War Pirate :: Talent tree Druid (2/5 feral aggression, thick hide)