I'm no Kara specialist (as I haven't been there yet ) but your gear is very similar to mine link here. What I've been told is to get defense up to 490, but other than that you're gear should be fine.
Get [item]Dabiri's Enigma[/item] that's the one in Netherstorm I think
and the rings to get is either of
[item]Iron Band of the Unbreakable[/item] from LT Drake in Old Hillsbrad
[item]Andormu's Tear[/item] from the Black Morass quest
[item]Protector's Mark of the Redemption[/item] shadowmoon quest, don't remember which one.
Or farm Arcatraz for [item]Elementium Band of the Sentry[/item]
With 478 Def and 32 Res, you are covered as far as Crit is concerned. Your Armor is fine for starting Kara, though I think you could work on your Stamina a bit. Remember, in almost every situation, straight Stam gems will serve you better than socket bonuses.