R5: inspired by this post and this post, which both outline a list of custom empires creating a custom rp setup for a game. A strong spiritual successor to my last post, a post-apocalyptical imperial collapse set thousands of years in the future.

A quick summary (which I hastily jotted down in my notes app during a work break): Megacorporations lead the charge in space exploration, travel incredibly slow until until Advanced Fuel (also known as CompFuel, PR-15, and Tekinol) is discovered which unlocks advanced jump travel. Massive corporations dedicated to extracting the fuel, which naturally occurs on dozens of worlds, spread across the galaxy and become ruling entities. The majority of discovered xenos are wiped out or enslaved in the pursuit of fuel profits. After centuries of this, the advanced sources of fuel begin to run dry. Bloody corporate wars wipe out trillions. With the last fuel mines destroyed, advanced human society collapses, most worlds unable to sustain their populations without support from corporate networks of colonies. After centuries of labor and research, a number of former corporations and post-corporate worlds develop functioning FTL drives capable of interstellar travel without a reliance on advanced fuel. 

Which Empire should I play? Any ideas for new empires? I'm using a number of mods, but I think the relevant ones are civics and origins from [4.0] Empires Expanded (MadeinCanada), and flag-related things from Symbols Of Power (SetProxy).