I am flattered, thank you for making the effort.
I have to say I am a bit stumped because this is a first for me. With little information I can deduce you are playing a game with a faction you made that is located out of the core worlds as it's stating point. My guess is that you play a heavily modded game based on your mention of Imperium and TTSC. I am curious, would you be willing to share your enabled_mods.json list? If you are unsure of it's location, it can be found in starsector\mods. For reference here is mine:
Spoiler
{"enabledMods": [
"pantera_ANewLevel30",
"apex_design",
"lw_autosave",
"BSC",
"HMI_brighton",
"ORK",
"CFT",
"CJHM",
"combatactivators",
"chatter",
"timid_commissioned_hull_mods",
"lw_console",
"Toaster_deciv",
"diableavionics",
"Diktat Enhancement",
"dex",
"edshipyard",
"EmergentThreats_Vice",
"EmergentThreats_IX_Revival",
"FPE",
"GrandColonies",
"GMDA",
"HMI_SV",
"HMI",
"hte",
"HIVER",
"aerialcombatsuit",
"IndEvo",
"Imperium",
"timid_xiv",
"JYD",
"keruvim_shipyards",
"lost_sector",
"lw_lazylib",
"LobsterCruiser",
"luddenhance",
"lunalib",
"MagicLib",
"Marvelous-Personas",
"Mayasuran Navy",
"MoreBarMissions",
"MoreMilitaryMissions",
"wisp_NeutrinoDetectorMkII",
"sun_new_beginnings",
"nexerelin",
"sun_nomadic_survival",
"objects_analysis",
"ObviousNeutron",
"JYDR",
"PirateMiniMegaMod",
"portrait_changer",
"progressiveSMods",
"pt_qolpack",
"QualityCaptains",
"assortment_of_things",
"sun_ruthless_sector",
"SCY",
"secretsofthefrontier",
"SEEKER",
"swp",
"spacetruckin",
"speedUp",
"sun_starship_legends",
"StopGapMeasures3",
"timid_supply_forging",
"supportships",
"surveycorpssp",
"presmattdamon_takenoprisoners",
"exalted",
"knights_of_ludd",
"TTSC",
"underworld",
"US",
"vic",
"vayrashippack",
"TouchOfVanilla_vri",
"whichmod",
"XhanEmpire",
"audio_plus",
"prvagni",
"prvextra",
"prvlib",
"prvPath",
"prvrb",
"prv",
"shaderLib"
]}
Well I make TTSC as well and to hear they have a massive empire is another puzzle for me. They start with 3 stations and no planets and essentially act as a police force for Tri-Tac space. They will hunt down enemies of Tri-Tac and do have the ability to invade but "massive empire" elicits the idea that they own most of the sector. Roughly what percent of your sector is inhabited by TTSC?
Well there is an option for defeated factions to re-spawn when you start the game, check to see if that is turned on. But even then it would not be the same experience because I custom crafted their systems to maximize their economic output while also not being able to trade with anyone. That is why I do not recommend using this mod in RCW mode because it ignores all faction settings when it generates a sector.
I would like to help with your statements but at this stage I am left with more questions than potential answers. Some more clarity would help me better understand the root causes of your concerns.