So hey guys, funny story. I was about to get started on that rework for the Infinity. However, it looks like I didn't actually save any of the ship designs---not even the missiles. I don't know if I'm ready for the emotional commitment of starting over again... the heart can only take so much...
That sucks. Hope it doesn't kill your enthusiasm though!
If it helps, I looked at the missiles to try and figure out what could possibly make three different anti-ship missiles distinct enough for Aurora, and I noticed the following:
350× 24 M42 Archer[2]
250× 30 M75 Rapier[2]
500× 20 M96 Howler[2]
The pod sizes for the missiles work out to the same total size of missiles per pod if you assign masses of Archer = 5 MSP, Rapier = 4 MSP, and Howler = 6 MSP, which incidentally correlates the suggestion I saw elsewhere that Howlers are the strongest of these missiles by a fair margin.
Based on that and using the tech levels in the OP (inertial CF engines plus at the described tech level 160 agility per MSP and 12 warhead strength per MSP) I drew up these designs, which could probably be made more distinctive from one another but you get the idea.
M42 Archer: 1.333334 MSP warhead, 1.001041 MSP fuel, 1.215625 MSP agility, 1.45 MSP engine
Missile Size: 5.000000 MSP (12.5000000 Tons) Warhead: 16 Radiation Damage: 16 Manoeuvre Rating: 49
Speed: 55,680 km/s Fuel: 2,502 Flight Time: 8 minutes Range: 27.83m km
Cost Per Missile: 14.850002 Development Cost: 1,485
Chance to Hit: 1k km/s 2728.3% 3k km/s 909.4% 5k km/s 545.7% 10k km/s 272.8%
M75 Rapier: 0.75 MSP warhead, 1.003125 MSP fuel, 0.996875 MSP agility, 1.25 MSP engine
Missile Size: 4.000000 MSP (10.0000000 Tons) Warhead: 9 Radiation Damage: 9 Manoeuvre Rating: 50
Speed: 60,000 km/s Fuel: 2,507 Flight Time: 9 minutes Range: 32.36m km
Cost Per Missile: 11.440000 Development Cost: 1,144
Chance to Hit: 1k km/s 3000% 3k km/s 1000% 5k km/s 600% 10k km/s 300%
M96 Howler: 2.083334 MSP warhead, 1.002291 MSP fuel, 1.234375 MSP agility, 1.68 MSP engine
Missile Size: 6.000000 MSP (15.0000000 Tons) Warhead: 25 Radiation Damage: 25 Manoeuvre Rating: 43
Speed: 53,767 km/s Fuel: 2,505 Flight Time: 8 minutes Range: 25m km
Cost Per Missile: 18.260002 Development Cost: 1,826
Chance to Hit: 1k km/s 2312.0% 3k km/s 770.7% 5k km/s 462.4% 10k km/s 231.2%
M97 Lance: 0.083334 MSP warhead, 0.102291 MSP fuel, 0.384375 MSP agility, 0.43 MSP engine
Missile Size: 1.000000 MSP (2.5000000 Tons) Warhead: 1 Radiation Damage: 1 Manoeuvre Rating: 72
Speed: 82,600 km/s Fuel: 255 Flight Time: 93.5 seconds Range: 7,723,100 km
Cost Per Missile: 3.540002 Development Cost: 354
Chance to Hit: 1k km/s 5947.2% 3k km/s 1982.4% 5k km/s 1189.4% 10k km/s 594.7%
Threw in the AMM while I was at it. This gives you a standard missile (Archer), a fast missile for killing smaller ships (Rapier), and a heavy missile (Howler) for people you really, really hate. I should note in fairness that I would probably never, ever build a ship that fires four different kinds of combat missiles, but I also would never, ever build a 907-million ton supercarrier. At that size, you can afford a few frivolities.