League has avarice mixed guild, also they have a German guild, Turkish, and French as far as I know. Empire has utopie mixed guild and turen a turkish guild. But yeah we will see if 7.0 brings more people but don't hold your breath
As for healing classes summoner, priest, and warden though I hear summoner is not as great in healing aspect as it was before this patch. I hear warden and priest are the good healing classes now I could be wrong. Best thing I can say is try it the game see what class you like.