Caustic trap is small joke, enemy just RUN pass by and pass through it, doesn't do any sh*t, why? trigger radius is so small and kick in so slow.
You basically has to throw (1-2 second depend on the distance), wait to deploy(1-2 second), shot it yourself(1 second), then it start to smoke. That almost 4-5 seconds before start doing any sh*t. I throw gas trap to enemy who is busy looting, exactly next where he stand/crawl, expect he will get shocked, and intoxicated, disoriented but trap doesn't do sh*t, since it need 4-5 seconds to start to work !???
You can use for defense inside a room/building when you know enemy is coming & WALKING but you can't use for offense.
The trap need to deploy faster, have bigger trigger radius and bigger initial shock.
His ultimate is the biggest JOKE! Don't get me started.