What does having tetrastrike do? It's an autoability equiped by a garment grid.
Also, is the completion guide in the back of the strategy guide accurate? I've been following it so I'm pretty sure I haven't missed anything but my completion is less than what it the guide in the back says. A friend of mine is playing through the game too and his completion is less than what the guide says also, but equal to what mine was at that point in the game.