I am creating a Space opera which involves highly advanced civilizations spreading throughout the universe to build the largest empires that they can. Dense supercluster nodes are areas which the most advanced flock to as these are the richest areas for matter and energy, and as these areas draw in surrounding galaxies less energy will be need to be spent to travel to and build empires and technology like Dyson swarms and other megastructures to manipulate the available energy.
My story is fairly Hard-science and has no FTL but the advanced civilizations have gained immortality through various technological methods, so taking a very long trip to distant areas of space is not an issue.
I have studied maps of supercluster arrangements extensively as well as trying to look for a pattern, due to our galaxy being the centre of most of these maps it seems like all matter forms in planes that meet in the centre which is our location but this just on the local scale. I stumbled across some maps which placed all the superclusters onto the nodes and edges of an octahedral pattern, with the voids being the volume of the octahedrons. This theory is known as the "Egg-carton" or Octahedral universe theory and I when compared to every large scale map of the universe it seems quite correct.
I dont wish to question this theory but I will accept it for my story and maps in my story but now my civilization has that information what can they do with it? I am asking for only hints and tips, maybe ideas present in other science fiction stories or lesser known and currently unaccepted theories.
Knowing these diagonal paths of matter run through the observable universe could be used as paths for ships equipped with an ion scoop like a Bussard ramjet, flying down the filaments with an endless supply fuel but there are more efficient methods of travel in a no FTL universe which could reach higher speeds, so this idea is not really that useful
I am not after a major part of my story to be written for me but any hints or tips, or even completely wild ideas are welcome to help me think of a way to use this Octahedral structure of the universe as a benefit to the advanced species in my story. Thank you.
Bounty edits: As I have put this up as a bounty with authoritative reference I would prefer theories that can be backed up with maths on ways to manipulate or find a purpose for this structure but I will keep the rest of my question un edited for any answers that cannot be backed with maths.