This variant has been adapted to by a new father in the Discord community. He scheduled a pronap while shortening the core down to only 3h20m. He has been adapted to this variant and maintaining it in the face of daily life for more than a year (and counting). Only sleepers with at least slightly reduced sleep requirements (6-7h) should attempt this variant, which is effectively E3 with one fewer nap, where E3 by itself is already a very intense schedule.
