The IAS on the ammy does nothing for you. Replace it with more CC and maybe an average damage roll.
Your Hellfire ring is not good enough to be worth the slot. Get a rare ring with CC, 9 IAS and AR. Alternatively, get a Nat's ring with CC, AR and 9 IAS and Nat's boots with Int/Vit for the 7 CC bonus. This will also push you over the 2.728 breakpoint.
You're low on LoH and APoC. This is why you're forced to run with Prism. Get a Storm Crow with 5.5+ CC and 420+ LoH.
When you get AR on an item, get 65+. 2 rolls of 40 AR will cost more than 1 roll of 80. Look for more AR on chest, pants, belt and bracers. Drop Int on such pieces if necessary. When you hit something like 750-800 AR, you can switch to an SNS setup, with Diamond Shards and Shocking Aspect, which will buff your eDPS by 30-40%, more than making up for any lost Int. See PieHole's excellent guide for more information: http://us.battle.net/d3/en/forum/topic/8728753771
Please stop putting Marquise gems in your armor. Such a waste of gold. :(