Everyone seems to have plan shaping well in hand, So looking at what we killed we can probably guess that outside of some outliers, that's what will make up the remains of the Neons ship forces, Looks like fairly standard imperial fair, although a lack of cobra's is strange.
We know they are currently engaged with chaos, So I actually expect a majority of their fleet is currently their and taking attrition. Given the astropath plot, the chaos is probably tzeentchian, this was way to subtle for khorne and not enough disease for nurgle, so that ,means slanesh, Chaos undivided or tzeenchian chaos forces are who their fighting.
This plot was probably meant to either stop the fleets here from reinforcing the other front (which we did by killing them) via disrupting the astropath shipment, or trying to headcap some command staff and cause internal strife via chaos spawn. Either way, I expect that the Chaos front is either looseing and looking for triksy options, Or going for a Hammer blow that they wanted to keep reinforcements out of in order to break a stalemate.
The Imperials we killed include Vipers, Who use a torpedo armament. Dangerous, but should be countered by Fighters, Provided the fighters aren't bogged down by a dictators worth of Planes, Swords who are seemingly worse or at most parity with the aries secundus. A firestorm, which is basically a sword dedicated to lance combat, and while a sword and Firestorm are speclized to their roll, They didn't' seem to field enough of them to actually overpower the Aries secundus at its jack of both trades approach which is a very good sigh towards the strength of the Aries-S.
the biggest problem with the dictators would have been the fact that they carry a scary number of ships. The best I can find is that it mounts 2 Jovian Pattern launch bays, Which apparently take up both the port and aft weapon sections of the Cruiser sized ship. So, a lot of Planes, In the best case scenario, That "only" The same amount as the libra-s. The sheer numbers probably would have bogged down our fighters, Leaving it down to a straight slugging match instead of having to watch for bombers up their aft, Which outside the aires-s goes to the imperium in ship quality Our only "Ship of the line" or "Brawler" is the aries, with both of our frigates being a torpedo boat and a lance piece, so if we end up brawling with anything bigger then escorts, we are at a disadvantage.
Notably, The Dictator retains the Lunar classe's (which it is a modification of) torpedo and Weapons batteries, Having traded its lance decks for the pair of jovian launch bays. That means unlike the Libra-S who is solely a Carrier, it is still a Incredibly durable and punchy ship that can bully Aireas and just dive our lines tp go to town on us, with it own fighters stopping our bombers from making that risky.
In the event of the Neons Having MORE Dictators, Or hell other Brawler cruisers with smaller carriers, the best case scenario from a ship design perspective is to have a hybrid Brawler Fighter carrier/light cruiser that can help tip the Air fight back in our favour, While drawing th Dictators attention away from being able to Maul our aries secondus, leaving them to dual with someone their own size.
Something like this perhaps?
[] Firebrand Class light cruiser
-[] Length - 4.000 (-2)
-[] Width - 450 (-1)
-[] Acceleration - 3.5
-[] Armor - Medium Double Hull(-2)
-[] Shields -Two Arrays (-2)
-[] Weapons- Medium Hangard Bay - Fighter (-2), Heavy Macro-Cannons (turret) (-3)
-Equipment - genelines (-1), Armoured Lifepods(-1) Advanced alloying (-1)
Heavily revolving around Durability and Closer range combat in order to either bully ships that so far have been engaging the Aries, Or Tie down and keep larger Brawling ships busy, giving our Superiors pilots time to outfly their competition and get back in the fight for ship hunting. The Inclusion of a Medium Hangar bay is aimed almost solely at countering Ships similar to the Dictator, Brawler/Carrier hybrids who can bogs down our own Fighter and bomber forces before proceding to bully our frontline/Brawler ships that protect our own crarrier vessels through sheer weight and size. Advanced alloys and a bunch of durability options means that even a cruiser weight ship should be forced to dedicate actual time killing it, and the Heavy Macrocannons ensure that it can't be ignored to focus on bullying smaller Aries ships.
Notably, the dictator is actually fairly easy for us to adapt to, "just" requiring some form of Ship to help anchor the line so it can't just bogg down our planes and then start swinging, acting like an elephant among men as it bullies the aries-s. A Lunar would be IMO more dangerous for our current fleet, Having a dangerous trio of Lance decks, Weapon batteries and Torpedos. Arguably, it is to Cruisers what the Areis-S is to escorts, able to put out dangerous and withering levels of firepower at every range and packing a torpedo Otk for an enemy that is either bigger then it or didn't respect it, versus the dictator who we can hopefully overcome by having a tank ship hold it down while our better pilots clear the chaff it put out.
TL
R The imperial ships are fairly standard in compisition, Thank god we haven't seen a lunar cruiser instead, we can probably rule out two flavors of chaos and we need a Punchy/Tanky ship to stop Heavy weight brawlers/brawler Hybrids from running over our Aries-S, who is the only kind of line holder/Brawler/Punchy ship we have.