I just started my first Thid SB I've never been much of a thid  player more of a NF guy. Anyway I made a shadowzerg spec and I still don't feel I'm hitting for that hard. I'm wondering if anyone has any insight on good thid Sb specs?

did you mean shadowzerker? post your exact spec and a bit of your gear and ill set you on the right track.

Stealth 19+4

LA 6+3

Axe 20+3

CS 21+3

env 3+5

are you perfing with 2hander?

Nah I probably should I'm guessing.

heh yeh thats one of the big benefits a SB gets. you can perf with ur 2hander for more damage and an extra poison, then switch to your 2 axes and finish em off. What kinda gear are u using ? aurulite im guessing?

Also use your CS styles and not your Axe styles.  CS lines do more damage.  Essentially all assassin classes will have a weapon in their 2 handed slot that is as slow as possible with as high as possible dps.  You PA with that, then switch to dual wield and use your CS styles.  The use of 3 poisons, plus PA, and CS styles drops most targets quickly.

My gear is all SCed

Hmm most critblades dont spec their main hand weapon over 17 and raise en venom to least 10. 

Not sure what shadowzerg spec is ;) but shadowzerk which is little or no cs and high LA  is pretty strong at thid level and extends your range of target to any class (withthe exception of reavers possibly) as they can pretty much out melee a tank class with that spec