It would be easier to just reduce the total number dice by 2, or by 1 if all of the firing dice are from rifles.One possibility for trying is that cavalry attachments only effect a single firing unit (the argument being that the single squadron in question needs to concentrate its efforts and probably lacks sufficient command/control anyway to be effectively haring off discouraging clouds of skirmishers originating from varied sources) ??
Something less drastic would be required for cavalry units
