The blimps are super strong but with a good team they go down like the Hindenburg. I'd say I've been killed by mortars and gas a little more than everything else. I don't think that you should follow your mortar round and actually see what you hit. That's the point of having spotters and teammates in real life. Take the Fortress Guns for example. Super powerful but very hard to use alone. I had 2 squadmates up close to the front spotting the fall of my rounds and adjusting my fire and I got around 15 kills with it.