It’s easy i didnt die there. Just let him shoot 1 time and look where he is. He will come out of his cover to the right or to the left. Let him shoot again and then look where he is running to. aim at the side where he is coming out all the time and after 2-3 secs hold your breath. shoot at his body, if you wound him do it again. Just move as you see hes fireing.