So true >_<. I beat it on Veteran without too much difficulty...except for the last part. My God that was awful. It would have been so much easier if my AI buddy could stay alive to actually cover one of my sides :-/
Every time a friendly went down and I had to revive them, I couldn't help but ask myself why they didn't co-op the single player on this. It would have made for a much more enjoyable experience.