There isn't much/if any play outside of Mondays now really i believe. There is a mod set we use (info from the sticky -
https://SimHQ.com/forum/ubbthreads....sessions-who-what-when-where#Post3732626 ) its a big download so i'd let it run overnight, if you already play modded arma then chances are you'll prolly have most of them already so that'll cut down the download size
As for comms, its still the TS server, info in the sticky -
https://SimHQ.com/forum/ubbthreads.php/topics/4314955/new-teamspeak-server-info#Post4314955