I see im the only person who said "NO" here

Im a lvl 54 Rogue using Crossbow and Daggers. my poison weapon is lvl 5. I think the answear is simple if you use Crossbow - skip it , if you are Dagger user( close combat ) use it. with passive poison dmg and effect increase it makes a noticeable damage. and additional 250-350 poison dmg per second shouldnt be forgotten.