I've completed multiple battles today with the F-34T trainind droid disk applied in conquest and in every one of them i killed all enemies and no kills were insta-kills.
First match was New Republic to get on the run and thought maybe because I had the disk that applies DOTs the DOTs were killing them. So removed them and nope still killed everyone in the next attempt.
Then went to finish my staggers in sector 1 with a team of Palpatine, Mara Jade, Sabine Wren, Bastilla Shan (Fallen) and Scout Trooper. Killed all enemies in less than 2 minutes. None of these characters have an insta-kill.