Wouldn't Min's viewings involving the fireflies taken together with the swirling colors seem to indicate that the ta'veren's best chance of winning would ultimately come if they stayed/fought as close together as possible, as opposed to splitting their command structure in this way? I suppose they could also refer to a single event that will happen in ToM that would require them to be near one another, but I think they deal with their odds of winning the conflict as a whole.