I said this in another thread, but I feel it's valuable here, too. My team has no ability to score co-op. We make this clear to all our alliance partners. However, we stack the co-op totes at the beginning of the match and then pass them to an alliance partner to hopefully score them. (assist?) It's pretty fast, out of the feeder. There's no loss, even if co-op isn't completed, because we still can put up 2-3 stacks in the time remaining.