Ahhhhhhhhh I was so close!!
Story time:
After about 6 hours spread over 3 days of bashing my head into a wall, rethinking everything I thought I ever knew about superships, fleet doctrine, positioning and alpha strikes, tinkering and retinkering the Izanagi's loadout over and over again; the stars align right with my two remaining braincells and I finally get an attempt where I manage to bait the Onslaught and most of the Colossus and Dominators into a spot where I could pin them down between the Izanagi and the rest of my fleet.
We get some good shots in and manage to blow up the Colossus to stop those annoying fighter runs, before reinforcements arrive sooner than I thought they would and my encirclement suddenly finds itself encircled.
A frantic brawl ensues with the Wolf frigates and the remaining freighters on one side against the Izanagi desperately holding the encirclement (rapidly breaking into a distorted half-circle as the enemy regains their footing) on the other; after a minute I manage to pull through what almost became my latest failed attempt, in no small part thanks to the valiant sacrifice of both Monitor ships distracting the Dominators and the Onslaught. After that I order all ships to close in where we still have the Onslaught pinned down and successfully destroy it, nearly blowing out the Izanagi's systems along with it might I add considering the time it took our fleet's puny guns to chew through its armor meant it was well past PPT and had only a third of its CR and hull remaining.
It took another half-minute after that to blast through the remaining Dominator and Enforcer and mop up what was so far looking to be finally the run where I could put this victory behind me; and not a moment too soon with the Izanagi having to withdraw after the final ship was taken out since it had fallen below 10% CR and was rapidly plummeting to zero.
but then my joy quickly morphed into HORROR as I spied at the edge of the fog a single freighter, having somehow escaped in the chaos and rapidly fleeing upward to safety.
I go "oh HELL naw brother" and send everything I have left to chase it, but with both Monitors destroyed and the Izanagi worn down to little more than a drifting metal triangle I am out of options to pursue and have to watch in slow painful agony as the freighter easily leaves my remaining ships in the dirt; taking with it presumably the secret of Lethia's location and our doom.
RIP in peace boys, we'll get 'em next time
Fantastic mod, been having a blast with it (if that wasn't already obvious). Can't wait to use the Izanagi as my flagship next playthrough; this mission taught me to love that fast metal triangle and boy, do I
love it.
(The build I used on the Izanagi was 3 Overcharged Fusion Torches, 2 Annihilator rockets, 2 Light Needlers and Converted Hanger mounting a Claw Fighter wing, in case you were curious.)