Hey, so I'm on the first mission in Vega, I get through most of it fine but the part with the ace gets me no matter what I do, is he invincible? The first time I tried it I didn't have any missiles left but he just absorbed everything I had and killed me like it was nothing. Second time I saved all my missiles but he killed me before I could fire one off. Is he just incredibly hard? Any tips on how to deal with him?