This is a bug I encountered today, after hours of grinding, I was very happy to find that there was a bug in the mission. If I don't kill Enkaar the first time I see him, (the first draw) I die from him no matter what. I hit his hand, he gets stunned, and then he shoots me and I die. The only way to stop this is to start it again, and if you fail? the same thing happens. No matter what I do I die. please help.
You'll have to shoot him faster. If you take too long to shoot, it'll appear as if he's stunned but he'll still shoot. Try to shoot once you see that he moves his arm, then you should be good to go.