Generally, Remnant have pretty big op pools
outright false. brilliant has very low op for a cruiser of its cost. it sits at 140 while something like champion sits at 165. even eradicator and eagle are 150 and 155 respectively. lumen sits at 35 op which is very low for a 4 dp ship. glimmer has 5 less op than wolf which has the same dp. radiant only has 5 more op than conq while having significantly less than paragon and onslaught. granted, fulgent has average op compared to most normal destroyers at 100(for comparison hammerhead is 95, enforcer is 110, sunder is 105, medusa is 95, and manticore is 90), but it also has relatively low base flux stats compared to something like medusa while also being slower. the only aberrant is scintilla which has significantly higher op than the other carriers in its hull size at 75 op, but that's tolerable since it has a very limited selection of wings due to being remnant.
Though how is thornbill and the Lanius broken?
lanius has very high op, with very high base flux stats on top of that so with SO and its very strong ability it ends up being a fulgent that's better in nearly every way, as stated before. thornbill I though was a cruiser just going by its size. having fought it I can say it's the only destroyer in this mod that isn't overtuned.
The Luster is not a aleste with a remnant skin, it is its own mech. While I admit the dp could maybe use work, the reason it gets a wingcom is because I wanted it to have a wing to back it up similar to leynos or VX or Gunhazard. Since Gettag released the ai core equivalents for ai ships, I'm gonna be giving it that next update. 0.6 is around the standard for remnant ships and the thing with it not dying has been fixed in dev.
However can you explain what you mean by retreating through phase anchor? It's not a phase ship so it shouldn't be escaping with it. It may be a issue with strikecraft so I'll have to check in with gettag since it using his strikecraft code. (This is why it does't spawn if you don't have arma enabled)
you don't need to give it wingcom for it to have its own support(not that it would need it given how insane it is). I don't know where you got that impression from. the einhander has built-in drones and doesn't have wing-com.
that aside, luster is insane because it breaks basically all importants rules of arma's mechs. no matter what type of shield the frigate mechs in arma have, the efficiency is nearly always 1. it doesn't matter whether it's a front or omni-shield. the efficiency is almost always 1 as a balancing mechanism for their speed, evasiveness, and strike capabilities. otherwise, they become way too efficient for their cost(which is already higher than what you've given that abomination). That aside, even with their lower shield efficiency their flux cap never goes above 2k and their flux dissipation never goes above 225. the only exceptions are the mechs that exclusively phase instead of a using shield and the valkhazard which costs 15 dp to field. this is so they cant just infinitely tank things by stacking things like officers with the shield efficiency skill + built in hardened shields to mitigate the core design of the mechs. luster breaks all of these limits. it has 0.6 shield, higher base flux values than the valkhazard, and costs next to nothing to field. hell, valkhazard doesn't even have a support drones or anything, yet luster has very high flux values, cost nearly 1/3 to field, has a more efficient shield that's an omni compared to valk's relatively small front shield, and a wing to complement it on top of that. this is very clearly massively overtuned.
about the retreating thing, after you "destroy" a luster it just goes up in a puff of smoke similar to the way most ox tugs do when they're destroyed. then after the battle, you're given the option to pursue it for whatever reason even thought it should A: be destroyed since you blew it up and B: not retreat since it's a remnant.
Also what's wrong with luminous?
it's ability puts it way over the top. that ability is okay on the cetan since its buster works off an ammo system, but the luminous doesn't so for the entire duration of the ability it just gets to wail on you undeterred. the best defense in starsector is a good offense and the flow of a fight heavily favors the effective application of strike capabilities. so a frigate that costs a measly 8 dp that can bully most cruisers in a straight up fight while also moving at such high speeds with a relatively small frame to avoid counterattacks is pretty overtuned. on that note it even has better base flux stats than the cetan which costs nearly twice as much to field.