I have to disagree with your statement on concussion missiles.
When ran with Captain jonus, as long as you have a target lock/focus you are pretty much guaranteed 4 hits. Since only 3/4 need to have a hit/crit/focus icon. They are a great way to get rid of stealth device or alpha strike.
I would say that concussion missiles are the best missiles/torp at 4 points.
Cluster missiles are too random and hard to use effectively on the second shot, proton torps use one of your Focus for a crit, which leaves your blanks to stay blanks.