I am a casual W:I gamer. I own the Core Set (qty=1) as well as the Assault on Ulthuan deluxe expansion (qty=1) and nothing more. When our group plays W:I, we simply take two of the preconstructed race decks (of the 6 available) and shuffle in 10 random, neutral cards as indicated in the core rulebook.
I am looking for a battle pack that would provide a number of good, generic neutral cards, so that I can expand the population of neutral cards that we have available. I am not, however, looking to change the preconstructed race decks, since they work well for our group's style of casual play. I have noticed the neutral cards provided in the Core set as well as AoU are solid, generic, support cards (support with a lower-case "s"; not as in Support, the card type) that work with any of the preconstructed race decks. I am looking for more cards like those.