It boils down to playstyle and situational plus pockets heals. Blackvenom Dagger hand can proc and remove you from stealth , but has never happened yet to me But, I only wear my dagger situationally.
Safe path is outlaw with b.claw offhand. If your alliance double dagger or some people like boa in main hand with weapon chain and b.claw. Like I said its all prefrence. I've seen double Boa maces - the haste from maces along stacking haste trinkets x 2 plus with the haste from boa pants and 40 haste from herbalism. haste stacking ive seen effective & very smexy.
Best rogues are the ones with different gear sets & think out of the box, IMO