Have you... Tried this? In-game? Recently?
There's a critical mass of Pilums where the enemy fighter screens and PD can't clear them out. The exact count depends on your own interceptors, flare-equipped fighters, long-range kinetic suppression, etc.
Once there's a Macross-tier Pilum field deployed, several things happen:
- AI ships are intimidated and less likely to push forward. It doesn't feel like the AI can differentiate between an incoming Harpoon swarm and low-threat Pilums, so it treats both with the same respect. (This is also what makes Diable Avionics micromissiles so useful.)
- Enemy ships with disabled engines and high-flux are suddenly in great danger. Pilums are very effective at stripping armor, you just need to build your fleet around kinetic+fragmentation damage with some EMP for disabling engines.
- All of this happens
in your back line. Your front line ships are free to do whatever, be whatever - the Pilum/Salamander/Broadsword hell-curtain is coming exclusively from support ships and escort frigates. (Although you can do it with front line ships too. Try a Legion with kinetic large guns, Pilums, and some mix of flare-equipped kinetic fighters/claws/interceptors.) Your front line can now bring more fragmentation damage to destroy ships faster, or carry additional PD/spend points on logistics hullmods.
- This concentrated fire is less mobile and far-reaching than what carrier-heavy fleets can do, but looks extremely cool. It's also more point-effective than stacking fighters and bombers, so the enemy is eager to engage the fleet and you don't have to inefficiently over-deploy then cry about "coward AI" evading your obviously superior force.
The 30-clip (60 with EMR) limit just means Fast Missile Rack ships fire in an initial burst then level off. That many Pilum volleys is a ton of threat from a very safe range. This won't work on a Flak-covered Onslaught without a ton of EMP, but it grinds through most ships in the game.
Unusual strategies aren't as effective as the current fighter/bomber dominance, but everything posted so far is viable with a bit of creativity in your fleet composition.