Off the top of my head: the badge neck, combat shotgun, and ancient aligned girdle would help you out a good bit. Earthguard ring, yes. Also keep an eye on the AH for Wapach's Spaulders, as they'll push your expertise a bit. They won't be cheap, of course; just use your judgement as to how much they're worth to you. My take: it'd be worth quite a bit to lose the parry rating on your current shoulders and replace it with expertise shoulders.
Good luck and have fun.
Torgo, you're missing the fight! Get your dress on and get in there!