In this video, the Defiant is shown using a phaser seemingly emitting from its deflector dish. However, we know from "Starship Down" that it could only be used as a last-ditch attempt and could only be fired once. Why would they fire it against the Lakota where they had plenty of other weapons instead of using a last ditch weapon?
Bonus Question: Why is the Defiant seemingly always only using its pulse phasers and quantum torpedoes in huge fights, why can't they use the other phaser emitters as well to try to maximize damage to the opponent?