You can easily outmaneuver your opponent in a LF and shoot it from the back, while CD thhe target, so it cant EK all the time.
A light fighter swarm is even more deadly, I think 4 Liberators got no problem taking down a cruiser/destroyer.
The thing is, in a LF you have to be very patient, you are the one to dodge and wait for the right moment; of course, if you fly your light fighter like a Guardian for example, you got no chance.