What is your techlevel re. missile warheads? Because, especially against such large ships as you encountered in Tau Ceti, it will take a bloody awfull lot of 1-dmg-pt hits to get through even the modest armor.
Throwing together a 24.000t ship, I see it will be covered by about 70 pts of armor per armor-level.
Assuming the enemy to have at least 3 levels of armor seems reasonable.
Your missiles should have a chance to hit the enemy of about 70%
This, in turn means, you´ll need about 270 missiles to destroy all the armor on one of the enemies ships. Of course, the first internal hits will take place sooner, but still...
And this leaves PD fire completely out of the equation.
What I am trying to say here is: Strength 1 warheads are realy too small, IMO. I would try to up the warhead tech, so I could squeeze a strength 4 warhead in, which will at least penetrate the second layer of armor
The advantage of small missiles is, you can mount a lot of them on your warships, which is good to overwhelm enemy PD, but your cruisers only mount 4 launchers each which is a rather small salvo. With 4 cruisers planned for your squadron, total throw weight is 16 missiles every 20 seconds (not enough). I´d assume at least half of those will be taken out by enemy point-blank PD-fire (I don´t think AMMs are a huge concern, because, given the large magazines you mount, you can probably outlast the enemy in that regard simply on ammo (or at least hope for that))
To make the damage thing clear:
4-point missile hit
[attachment=1:kzdpaf2s]4-pt-missile.JPG[/attachment:kzdpaf2s]
8-point missile hit
[attachment=0:kzdpaf2s]8-pt-missile.JPG[/attachment:kzdpaf2s]
