First thing I would upgrade is all those star gems. Those will be a decent boost for a very low amount of money.
The first item I would upgrade is your vile ward. It really doesn't match up to the rest of your gear as far as quality goes.
Either change out your helm for a CC zuni's or your weapon for a high CD weapon instead of mana/sec. Even with a bears build which you currently aren't running you can do with 1-2 mana/sec gear slots and use the other(s) for dmg.
Weapon adding another 90 CD would net you around 20k realized dps.
@Hamslice: Zuni boots to finish set, then get a Zuni ring and replace your mojo with a Thing of the Deep. That will serve you better for now.
As for myself, I'm starting to run out of obvious upgrades.
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