What would be more DPS for my rogue? Upgrading my haste item or offhand?

[KorafRN]

if you use similar ratio mh/oh, and RB to backstab, you should see around 40/40/20 split. Rb/claw parses is just heavily skewed because you're using a kunark ratio wep with a velious ratio wep for auto attack dmg. It's probably not the norm for your offhand to fire more often than your mainhand.