The Federation uses photon and quantum torpedos, briefly used transphasic torpedoes in Trek Lit, the Cardassians use plasma torpedoes, and the Klingons and Romulans use some type of photon torpedo. Even the Borg seem to use some type of torpedo system, as depicted in Voyager's "Scorpion" and "Star Trek:First Contact". But what we don't necessarily know is how powerful these systems are compared to one another. On a scale of 1 to 10 in terms of power, I am thinking the Cardassian plasma torpedo is about a 4, the Federation photon torpedo and Klingon and Romulan versions about a 5, the Borg torpedo a 7, and the quantum torpedo an 8. Thoughts?