How do I find groups for Conquests?

[Korban 0]

Closing in on the end of the season I've got most of the achievements cleared out except for a couple that seem much less frustrating with a group (Boss Mode/Worlds Apart and Curses/Stars Align). Unfortunately I don't know how to contact other people in need of these achievements (although finding them this late in the season is probably a longshot). The in-game public chats all seem to be pretty well dead. Where do I go to find people to group up with?

Edited February 5, 2018 by Korban