So, a few of the BF4 guys know I used to help admin an ARMA2 DayZ Overpoch server with some friends in my spare time, and their community owner has opened up an ARMA3 Epoch mod server.
I've played on it a bit last night, and it's probably the smoothest encounter I've had with ARMA3 so far (Wasteland and Altis Life being desyncing and just sluggish).
If you guys would be interested in trying it out with me their community site is: s7gaming.com the front page has all the information on how to join.
To install EPOCH, I'd just manually download it, extract the .zip, and put the @Epoch folder into the ARMA3 root folder. I used Arma3Launcher to join, I think it's made by the same people who made DayZLauncher.
any questions hit me up, we can try and get a large group together and just wreck shop, or just go nuts individually.