Do choking Gas fields stack?

[H a z Z y.1762]

Is there any point to spamming choking gas (on a downed body for example) to accelerate the pulsing of poison stacks or is one good enough?

[saerni.2584]

More poison and more stuns.

[Taobella.6597]

the daze does not stack but poison does however if you are running deadly ambition in WvW it more effective to cast 1 choking gas every 5 seconds then spam them on a player.

[Jugglemonkey.8741]

I'd say it depends on your condi duration and how much cleanse the opponent has. 100% duration would give 4s of poison per tick per choking gas field, while the daze is applied per tick regardless of how many fields. So if you have high condi duration it's worth immobilising an enemy and using multiple choking gas applications to stack poison over the threshold for the daze while saving other cooldowns like impairing daggers and steal for when they have no cleanse, otherwise you'll probably be better using one field for the daze and other sources of poison like steal traits for the stacks. This preserves ini while still forcing cleanses, which is better for a longer fight.