You set the parameters on one plugin and send the five tracks to it, rather than setting five plugins the same way. The goal is to get the tracks in the same "room". In different parts of the room (front to back, side to side), but in the same room. And...it saves resources for plugins that are specific to individual tracks. Global effects....put them on a buss. Especially memory hogs like ambience plugins. There's no magic. But there is the magician. You know...experience.