and does anyone want to join me so we have a better chance of getting them.
Since the premium playlist is no more, it’s based on description and luck.
For description you just need to enter the playlist for the Achievement (Living Dead for the infection ones, Objective for the flag ones, etc.) and for luck. . .You need to get paired with people who all have the Defiant DLC. I have only been paired once with Defiant DLC players, despite nearly 100 games. It’s tough.
Your best option is partying up with others who have the DLC.