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

[KorafRN]

I'm pretty sure cof is better than upgrading offhand. 3.5% offhand upgrade vs 9% bs cooldown. I'd even guess than RBB is slightly better as well. Every rogues damage splits will be different, but mine is roughly 40% bs / 40% mh/ 20% oh

Upgrading his haste won't affect auto attack since he uses ragebringer