FYI, the last post in this thread is 3 months old, I believe that\'s considered \'necroposting\' around here, as the thread is not stickied and has been quiet for so long.
Anyway, to answer your question, after hitting the (approximately) 1 million e/sec soft cap, power blocks, even in efficient configurations, start to become less and less effective, until each new block placed is worth only 25 e/sec each. Once you\'re certainly at the point where your new blocks are 25 e/sec, or perhaps before, depending on how finnicky you are, you have two options to increase your power regen: Solid lumps of power blocks, because efficient configurations are now useless, or set up some of Calbiri\'s docked reactors.
Moph\'s design in a 23^3 volume is essentially what I myself stumbled upon whilst building, and, for something created by a human alone, is about as good as it gets. With something such as the Reactor Breeder tool, though, I imagine that 1 million e/sec could be squished into a smaller volume, albeit in a way totally unintuitive to a human being.