Meanwhile, if a Wakahisa drains a bunch of Genin and fills Asuma up, and Asuma goes to the Seventh Path, Noburi can be waiting there to drain Asuma and return to the EN to pass that chakra to other summoners wherever they're gathered, who can bring out another summon or two and, critically, stay on the Human Path. In this way Asuma can keep going to and from the Seventh Path, Noburi can keep draining him and giving the chakra to other summoners, and an essentially unlimited number of summons can be fielded at the same time.