Gem Interaction Puncture + Poison Support

Couple of people had suggested me to use poison as a support for puncture traps. As i understand poison double dips projectile damage increases and trap damage increase.


Base duration of poison is 2 seconds, Base duration of Puncture is 5 seconds. What will be the duration of poison when puncture is supported by poison gem? Are there any cumulative effects happening in this gem interaction?

I am trying to understand how good or bad is poison when it supports puncture traps.

Puncture applies Bleed on a hit, but doesn't have an override for base Poison duration, so Puncture + Poison support will apply a 5 second bleed and a 2 second poison, before modifiers to skill effect duration.