I've been working on some Battlefleet Gothic style houserules for a simplest-style campaign.  My terrain table has a 3/8 chance of no terrain (barring the Exterminatus and Planetary Assault scenarios, which kind of need a planet).  I also changed Nebulae and Dust Clouds to be zone effects (like asteroid field) instead of global effects - making them zones increases the tactical thought that goes into positioning.  I also added a modified version of BFG's leadership rules; Ld values are generated for each ship at the start of the campaign as per BFG rules verbatim, but instead of the BFG rules for Ld tests, a ship trying to use Evasive Maneuvers, Directed Fire, or Damage Control must make an Ld test by rolling 2d6 and getting less than or equal to its Ld score.

The main thing, though, is that your mention of extreme attrition reminded me of a BFG campaign rule: when a ship is destroyed, you can get a free ship of the same type, but its leadership goes down to the minimum value (I think it was 6...  don't remember).  This gives you an incentive to maintain 'veteran' ships, but also prevents total destruction through attrition.

The problem with infantry as fighters is that their range is stuck at 1.  This may or may not be acceptable, depending on the details of the setting you're trying to model.

I've been using the Basic Movement option for my experiments in ground-based Starmada (namely playtesting the OGRE version someone posted in the Basin, then some MechWarrior and some WH40k of my own design) and it works pretty well.  I'm not entirely happy with how slowly infantry turn, but so it goes.

That's an interesting point...  if a flight of seekers with Bomber intersects a group of opposing fighters, do the seekers not detonate early because they can't attack the fighters?  That sounds kind of useful.  Also, Area Effect is seconded; I find that combining Area Effect with Bomber/Interceptor can be fairly handy, Bomber for offense and Interceptor for defense.

But yeah, definitely Seekers/Strikers and Cloaking or Stealth.  If you decide to try to do him one better at sitting out at range, use Minimum Range on your weapons for a discount and add a couple of inexpensive close-range weapons in case they close, or use Minimum Range & No Range Modifiers for x1 but an increase in long-range effectiveness.

On a tangentially related note, are there rules (or the possibility of rules) for Stealth or Cloaking Fighters?  Those would help get fighters in under the torrential firepower...

Edit: These might work:

Hornet-Class Missile Corvette Flotilla
Ships: X
Engines: 8
Shields: 0

No weapons

Specials: Cloaking Device, Carrier (22) per ship

Each ship can carry one flight of missiles with the following stats:
Seeker, 4/flight, Speed 15, 4+ to hit, Defense 0, Bomber, Piercing, Continuing Damage

Unfortunately, the spreadsheet I use doesn't like to price flotillas with Carrier capacity and no weapons (says they cost 0.  Convenient...), but my calculations by hand show them to cost about 26.5 points per ship (it scales linearly with the number of ships regardless of whether they're actually in flotillas or operating alone).

Actually, in retrospect, that wouldn't work so well, since you can't launch when you have the Cloak up and missile launch happens during End phase, so you have to survive the shooting phase of the turn you drop cloak.  They're still fairly cheap for the amount of carrier capacity you get, though.

This also brings up an issue I've been having with flotilla space pricing; if a special ability (say, Stealth) takes up 10% of a ship's hull, and each ship in a flotilla has 40 SU, does putting Stealth on a flotilla ship take up 4 SU per ship?  I ask because the Shipyard treats flotilla ships as Hull 1 for this purpose, so 10% is 10 SU.

I'd actually considered the multiple hyperdrives theory, and think it's totally workable.  Just hadn't used it because retreat isn't usually something I go for.  It'd be most useful in a campaign, though.

This reminds me of some rules I was working on for projecting special abilities into adjacent hexes, sort of Protoss Arbiter-style.  Never finished them, though.  It'd be a useful option to have, though...  AWACS-style projected fire control, Arbiter-style projected cloaking, EDT station projected hyperdrive, and the like.

Reasonable designs, though the Warspite/Wasp probably doesn't need to have Point Defense twice; I'm pretty sure Point Defense (and similarly Countermeasures) doesn't stack with itself (if it did, it would be kind of broken; you could have a near-total defense from fighters (or, with CM, standard ship weapons)).  Might be a question for the Powers That Be, though.

Looks pretty good.  If I were to use it, I'd probably change the terrain table a little (there's a lot more empty space than terrained space; maybe make a 4+ roll to see if there is terrain, and then roll terrain if there is, replacing empty space on your table with black hole).  Skirmish and Supply Raid also look fun; Supply Raid in particular reminds me of Battlefleet Gothic's similar scenario.  I might vary the classification of 'light ship' for the purposes of Skirmish (some of the fleets I use only have engines 5+), and allow anything with a particular percentage of its hull space taken up by Cargo to be classified as a cargo ship (and be worth VP/RP varying by its cargo capacity), but other than that...  good stuff.

Yeah...  there really isn't a good way to simulate the holofields.

It does give the same damage ranges...  I get the feeling that RoF 3, damage 2 would work OK, though RoF 6 might come closer to the 'automatically inflicts one hit' on anything within the radius.

Upon re-reading the ordinance rules, that seems a legit conversion, since they actually just roll against armor.
That's a pretty nice job on the Cobra, and quite a bit less expensive than mine, since it's not using carrier capacity.

The same idea hit me a couple days ago while re-reading the ordinance rules.  It would free up a lot of space, allow for carrying extra squadrons beyond the launch limits, or both.  One could also use the Interceptor and Bomber traits to reduce the sizes on the fighters, too, since BFG bombers can't attack fighters and BFG fighters can't attack ships.

I probably would've done the same, but the Shipyard requires that each fleet use the same shields technology, so I would've needed two separate spreadsheets.  Or I could hack in a 'faceted override' on the Template, maybe...

Hmmm...  I wonder if it would be balanced to allow the sacrifice of marines to deal non-hull damage.  So you teleport a marine squad to an enemy ship, and if it isn't canceled by an enemy marine squad on the same ship (ie, the ship has no marines), you can sacrifice them to cause a 'no hull damage' damage roll (the sacrifice being so that they don't later count towards hull reduction).  Maybe more than 1 NHD hit, since crits in BFG are pretty damaging.

Yeah, haven't found a really good way to simulate the holo-fields...  I went with Countermeasures and Point-Defense, but those don't quite do justice to the '1 in 6 chance to hit with lances and ordinance.'  Which might be for the better.

That's something I've been wondering about recently; is the three-trait limit a balance consideration or a sanity consideration, like the old three-battery limit?

That was about my line of thinking, yeah.

Ooh...  the double-range-mods is an excellent idea.  The only thing I don't agree with is the Fire-Linked; FL doesn't mean you have to fire all of the weapons in the battery, just that all of those you choose to fire use a single attack roll to hit.  About the only way to make it so that you have to fire all of the torps in one salvo would be to have one high-RoF weapon for the entire torpedo battery.

I initially tried the escorts as flotillas, but wasn't able to fit enough firepower or armor on to them for them to match their BFG counterparts.  There just isn't enough space in a .5-hull ship to fit multiple batteries in wide arcs and shields 4.  Or even just shields 4, for that matter, since the Shield Factor on a hull that small precludes anything but shields 1 (IIRC).

Those are pretty nice...  I converted Turrets to AFBs at a 1:4 ratio, since a turret in BFG can shoot down an entire squadron, while it takes many AFBs in Starmada to have the same effect.  However, freeing up the space from AFBs would allow for wider arcs...  Also, I did the math and Faceted (5,4,4,4,4,4) takes up the same amount of space as Shields 5 and yields the same increase of DRAT, so they're basically interchangeable; while Faceted does a better simulation of Imperial armor (though it doesn't quite do justice to the 90-degree 6+ prow), Shields 5 for the same price provide superior protection and less book-keeping.  Probably a personal preference thing.  I do like your version of the Dominator; I ran out of space for the batteries, so I only ended up with 9 on each side rather than 12.  Also, marines: the folks I play with rarely board, so piling a bunch of defensive marines on to things is usually pretty superfluous in our games.  I might have to try somewhere in the '4-6 marines, 2 teleporters' range, to make them offensively useful.  However, the teleporters are faithful to the source; hit-and-runs were something I kind of glossed over, since they're not something my group usually does.