I've managed to get to the final boss in offline mode pretty easily, but Galactus is just kicking my butt. I don't even quite know if my attacks are doing damage at all, and he usually wipes me out in 1-2 hits. Since he isn't like a standard fight (as he's HUGE), the usual tricks doesn't that well on him. What are some common strategies I should be looking out for when fighting him?
IGN has a section in their wiki about how to defeat Galactus, as well as a video. These ideas seem kind of simple, but apparently this is a strategy that works, even on very hard.