Bombardment and X-89 this is how you deal with the Yin. Use leadership early in the round, force them to choose to have influence or not. I think they are strong in 4th but not over the top. They also benefit from a smaller game as they can hold off 1 or 2 attacks easily. Let 5 players come at them and they will crumble like anyone else.
Are we talking about TI3 space goblins or TI4 Yin? The fact that I can even ask this question should tell us all something about the Yin...