You can trigger the gas easily enough by placing it then shooting it. This can be done directly in front of you to give you both physical cover and deny line of sight.
I agree with people saying the gas needs more height to it.
I would say instead of dealing more damage to the traps, they either tick damage faster, or reach max damage faster (IE 2 added damage per tick instead of 1).
Would also rather see the gas damage tick faster when 2 traps are in radius of an enemy rather than just adding 1 pip of damage for the extra trap.
Also not sure if his tactical is quite enough. I think he should be able to see more clearly in all gas, including Bangalore's. If his tactical is all about being experienced with gas, he shouldn't be as easily blinded by his own or others, IE able to peek outside his gas when others can't really see him inside his own.
