Playlist for don't touch that!

Don’t Touch That! (prevent the other team from touching the flag in a 1-flag game on a Defiant map) is the last achievement I need. What is the best playlist to try and get this achievement? What playlist even has the right gametype? I’d assume Squad DLC and Team Objective are the only places, but I just spend a lot of time in the Squad DLC playlist and didn’t run into it.