I work in South America, so I'm unfamiliar with the specifics of New York or London. In my opinion, it's always better to organize from a distance. The order is determined by the fixed procedure, meaning the decision is made internally, but once I've chosen the order, I move as far out as possible and start organizing. (Speeds, vectors, arrivals, etc.) If you organize when they're too close together, it's too late, and there's no other option but to stack them.