What the heck? Zombie dragon only had 20 hp left, I still had three people left, it was Mardek's turn; MISS! Zombie dragon did powerful attack and I was dead.
I ain't very good at this game, but after a few times I finished the sniper challenge in 54 seconds. It isn't very hard to do when you just know where you have to shoot with each wind direction and, most important, you start aiming at the next target before you zoom out to switch bullets. And don't zoom in, you will just be wasting time with that.