3 Things I notice right away:
1) weapon. You'll need something with a higher DPS. I assume you're trying for Ironsoul? Any chance of getting Betrayer from naxx?
2) Rings. 1 blue, 1 tanking ring. Grab the ring from Heroic Gun if you need expertise. This leads me to #3
3) lvl 70 trinket. I assume you're using it for expertise. Replace it with Grim Toll and pick up expertise via gems/H Gun ring until you are up to 26 (you're at 25...so close!!)
Could get +10 stats on chest vs +8 but that's not a HUGE deal. Those are my observations on your gear. Hope that helps a bit!