I fear that this has become that kind of thread where if I don't post something even a little more ridicolous than the last battle it's not worth posting. Here it finally is. There are going to be a lot of typos and me naming things wrong so I hope you're ok with that

Long story short, previous campaign had become unplayable due to randomized sector having upwards to 9 colonized systems/stations in one star system, making save times take longer than actual play time. I restarded the campaign and played with the Kadur Again, only for them to be nuked by the Hegemony thanks to Nex and me honestly having better things to do than retaking the Revenant Gestalt from 5 grand invasion fleets all the time.
So I broke my commission with Kadur, wich are now desperately holding on and retaking their colonies only for them to be invaded by either Hegemony or Persean League and aligned myself with Hazard Mining Incorporated, I'm currently owning 2 colonies and have other 5 I conquered for HMI and then bought governance of. It's amazing how good of a feature that is provided you've got the money to litterally buy planets (you can't buy governance of planets that are over size 4), wich grants you the colony's income while the faction more or less babysits it against most threats.
Anyway, I'm at the beginning of late game when I'm starting to think of nuking certain very annoying factions where I decide to go on an exploration trip wen disaster strikes and I'm on the other side of the sector when the Roider Union decided to send a 3-fleet invasion force to Dover, my main planet that's in the Dominion resurgent Lore sector. What's worse is the fact that planet also has all my stored weapons/ships so I'm also losing around 350k a month in storage fees. Damn me and my hoarding.
There's nothing I can do for that so I tacbomb and raid their nearest planet out of spite, refuel/resupply and then head back to my now conquered home planet.
The fleets are barely dented from my forces and I try and kite some of them away to fight individually, wich proves useless. One brave allied picket manages to distract one fleet so I grow up some
cohones and finally enter the fray against two invasion fleets at once.
By this point I've somewhat refined my techinque of fighting a larger force. Choose a mobile fleet composition to push aggressively and kill the enemy fast enough for it to be continuously deploying stuff and npt being able to use its numerical advantage; then slowly start retreating to your side and retreat the moment any of the important ships start having CR degradation; what I did not expect out of this tried and true method was the sheer armound of times I had to do that.
To clear things up, I'm playing with an HMI/HMI Techmined/Pirate ship composition. HMI ships are mostly all damage dealers, HMI techmined are shield tanks and lastly, Pirate ships (mostly conversions from the Underworld mod) wich are a mobile mix of medium-to-long range firepower and Point Defence. The Roider union (as far as I've seen it) is built around carriers and everything is rather versatile, mobile and with a strong focus on durability. I've also used some Relic Ships from Tahlan Shipworks including the valhalla wich is 75FP in the earlier part of the campaign but they're now sitting in storage until I figure how (or overcome my procastinational tendencies and put my head into it for once) I can increase their FP values from their Json file.
First engagement is a go and I deploy the ships in my fleet who are the best at dealing with fighter/bomber overload, but it looks ike the AI is intend on deploying the battleships first for once, accompanied by small carrier ships, mainly the Ranch.
While the "Girth is Worth" and "Optimal Waistline" Scarecrow Cruisers tank and overload shields
And my "Plunder Then Yarr" Dragon Hybrid Battlecruiser (formerly an Odyssey) pummels them from afar with both guns and saturation bombers
Both of my Slugworth carriers mince them to pieces with their Rocksaw heavy fighters. I don't feel bad about spamming them at all, you'll see why later.
I push my lines "a bit" too far, all the way into their spawn when my own ships start getting CR problems so I have my cruisers escort the slower carriers while I take comand of the Dragon and backpedal beside them, until the moment I retreat everything at once. The first eggaments ends with the enemy having suffered little more than 100 fleetpoints worth of losses. Nowhere near enough to get more than 140 FP compared to the enemy's 260 in the next battle, so I grind on for the second serving!
The second battle starts and I change my composition up a bit to be more offense-focused. I bring in what is probably the strongest pound-for-pound Junker Ship from HMI, the Roach King and one of my favourite ships to pilot myself, the Marinas from HMI Techmined.
While the "Polnareff" just runs everything over with its disgusting firepower of 6 Arbalest Autocannons and two medium HE ballistics (wich are basically two light assault guns strapped togheder), I go around deleting frigades and phase ships with my Marinas (It gets 600 weapon damage and flux dissipation for like 2-3 seconds but it's virtually teethless when it's not active and is made of fiberglass), occasionally helping the bigger ships take down the enemy's big chungus squad.
This time around I remember to set defensive points for my fleet after having them capture some points so that I can properly fall back due to PPT time restrictions but I still have to fall back with smaller ships and replace them to properly use all my cruisers and capital
I retreat my forces once again as I finally start gaining extra FleetPoints as the enemy is destroyed/ gets disabled/ retreats since I decide to play it safe and commit to the third engagement, their list of destroyed/disabled ships now neatly filling up the ship window
The third battle begins with the enemy pushing its last, mostly mangled battleships out to meet my defensive line and recieve the proper treatment for that very specific illness called "You conquered my waifu and I'll now take your laifu".
The lost units now make way for some of the most annoying fighter/interceptor spam I've seen in a while, but it does not possess any sort of pushing power against my fleet fully kitted out with Point Defence AI and they soon get pushed back into their spawn, where the farm truly starts
It took three engagements but I can finally stand my ground and the enemy is forced into a retreat before I am, having taken too many losses. Now the FP balance is equal and I can finally deploy all my smaller, faster, slightly caffeinated and sometimes overridden ships to close the battle once and for all!
It seems there's only medium-small enemy carriers left in the enemy fleet and a LOT of them, leading to a very "muh FPS" aneurism-inducing struggle where every single one of my deployed units is in this exact situation:
The battle draws to a close and I can finally, FINALLY order my second in command to deal with all the stragglers as I reap a couple million units of XP for my guy and enough resources in the debris to warrant a couple of runs to the shortly retaken home planet of mine:
I honestly don't know how many enemy ships those were since the battle results can count a ship as both destroyed/disabled and retreated at the same time if the battle is spread across multiple engagements, but the one thing I'm sure of is that it was 1553 FleetPoints worth of enemies, 50-65% of that being carriers.
Result screen is quite predictable with the two Rocksaw carriers and the Roach King doing most of the damage, with the other units acting more as support and linebackers.
I'm glad the slugworths are not as disgusting now that I installed the new Roider update wich reduces Assault Cannon damage on the rocksaw to the soon-to-arrive 0.9.5 patch (100-->75).
I'm probably going to disrupt most Orbital Works/ Heavy Industries if not conquering most of the Roider Union planets where they have em to at least limit the ridicolous offensive they've given me as of late, but I'll probably have to invest several millions into star fortresses on each and every of my colonies first. This whole battle took me around 2 hours to come on top. I'd say "never again" but it was actually rather fun and challenging and I'll probably have to suffer the same fate when Hegemony/Sindrian Diktat/Persean League are next in the chopping block. WIll probably update this thread again in a week or two unless I get the very stupid idea of attacking multiple [Redacted] at once.
Have a good day and battle on folks!