Maybe evaluation on the adjusted censer is premature but I still feel the trinket is not worthwhile. Even if I knew exactly when it's about to fire off, it still seems too inconsistent to pick over others.

While the censer probably won't fire directly on top of a scroll or potion, they can get caught up in the path of a firestorm/icestorm. Even if the censer doesn't shoot when you're in the shop, it could fire right by the door and end with the shopkeeper leaving.

My priority with the trinkets is to improve my win rate. The risk/reward ratio is not good. The reward feels meager and the risk, while I guess manageable, doesn't compare with other lower risk yet higher reward trinkets.

I think for it to be worth picking, you would need to have warning before it sets off and have a clue as to which gas. It's a censer that takes a while to shoot out; I think it would make sense that you'd smell it before it's dealt.

But that's just me. Anyone really liking the censer? Are there strategies for it? Only thing I've got is throwing items at the grass squares adjacent to the point of impact since they can keep spawning grass for a couple of turns, depending on where the gas landed.