Haven't played Dragon Nest KR so I can't say. I have yet to find an active English Kritika guild. I'm in an english one in Dungeon Striker, but they seem dead last I went on (which was about 2 weeks ago), the game is also quite dead. Last Korean games I've played that had active guilds were DnF, Maplestory, and SD Gundam... not counting new releases that have huge influxes of English players trying atm (Black Desert, Closers, etc.). There might be some in Elsword too... but I haven't played Elsword KR before either.