You should have in in game lfg matchmaking for raids.. like world of war craft you type in to the area you know maybe go to a computer or a postmaster and have them share an lfg it would help out so much Cux not everyone is capable of making friends :)
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The fire team voice channel was implemented around 6 months ago so people who were not in the same fire team could talk to each other, it is just under-used. The groups section of this website is fantastic for joining clans and there is also a raid recruitment section right here in the forums.... This is a game based on being social and is driven by a community, you really need to join a clan brother, best of luck to you :-) (If you were on PS4 i would have invited you to play with me an my guys).. sedona87