Yes and no. The only thing he has that's beneficial to Calamity is the average damage (which is huge). Nats boots, no CD on nat's ring, and low CD rolls on both rare ring (which was sacrificed for AS) and witching hour hurts him a ton with a Calamity, as each point of CD after everything else is in place is huge due to not being able to stack a ton of CD on weapon.
so, i should get a better CD roll on my rings and Witching hour?
Sorry that your thread got a little off topic :D
It's a tad bit more complex than that, but yes. For Calamity, your first priority would be average damage, which is what you've done. Second is CD, because with a Calamity build, we lack CD, so it's an absolute must that you max out as much CD on gear as possible, and each point of CD becomes crucial.
At your gear level, I'd suggest no lower than 45 CD on both your ring and on your WH with at least 135 dex on WH. You may not be able to get a rare ring like yours with 45 CD for a decent price, but if you want to hit harder, I'd get rid of the attack speed on that rare and focus on high average damage, high dex, high CD and CC. Your nats ring, while not bad, hurts a ton due to no CD (remember, each point of CD is crucial). Not having CC on nats ring isn't a big deal at all for Calamity users, and should focus on high average damage, dex and at least 40% CD on it.
Last but not least, Go for zuni's boots with All Res and 8% elemental, due to the huge benefit of % damage on black weapons, and swap out your inna's chest to a nat's to keep your 2pc set bonus. You'll notice a pretty big increase by doing this as well.
Obviously I'm not saying you should do all of this at once, but if you're looking to play with your DH for a while and you are certain you want to stick to a Calamity, this is a guideline for which to get the most bang per hit out of your attacks as shown above.