Deezmix-gui works perfect. You can set it up in next to no time for free with a bit of googling

Open trackers irc.opentrackers.org Digital irc irc.digitalirc.org Corrupt net irc.corrupt-net.org

There is no official 1337x subreddit or discord group. Go to the 1337x official chat room (link on the front page of 1337x.to) and ask about a discord group or sub reddit and they will tell you its fake.