How do you operate all those Cobras? Isn't that micro management hell to launch all the torps correctly? I tend to have only four cruisers max in my fleet so I can control them all, more than that and it becomes tedious. Plus just on with torps since they require more micro management, at least bombers etc can be left on auto launch.
I put the extended range macro batteries on them. Then put the one that increases their accuracy. Lastly put the increased torpedo speed.
Then in battle I set them to face forward, range 9000, automate. Then I set the torpedoes and special orders on automate as well.
80% of the time they're fine like that as at range 9000 they're usually too far away to be targeted. However, if they get engaged on I use the cogitator and micro them away. It's actually quite difficult to kill them when they use the boosters as they can outrun almost anything including bombers. They also hurt quite a lot if left alone. They're like mini sentries from TF2.
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Edit:
I got curious to see how a good player would play the Eldar since the AI is garbage at it. I came across this:
https://www.youtube.com/watch?v=rENfk70891cWow, that looks lame as fuck. It's like horse archers x41000. I can't imagine fighting that. I'd need like 4 nova cannons or something just to make them come to me. Even then I can't even target them as they're invisible.