aiming torps just takes practice, and i generally aim mine in a "spread" pattern, with the cv group JUST to the edge of my screen unzoomed. (ish)
The #6 gun will kill most anything w/ wings with one hit. Learn it, and them pesky fighters will not be an issue. W/ practice you can nail 'em 3k out.
#6 gun ALSO is good to gun down the CV group (and towns). One pt can kill a cruiser easily w/ the #6 gun. Just stay out of ack range. Takes 3-4 hops to nail the flat top tho'. I generally go for the cruiser, then maybe one of the small support ships. Once they are out of the way, I will then go for the Carrier. After you've killed some of the guns on the Carrier, you can use rockets, and the other guns and get in close.
When you 1st pull on the trigger, you will get some climb on the gun. If you hold it down, it lvl's out and you can aim quite well. If you let off the trigger, you have to do it over again.
I've HIT cv's w/ the rockets, just not often. Like prev. said, they are mainly for score IMHO.
I rarely use any of the other guns in a pt.