Mitigation in those clips: Hallowed Ground Astral Shield Globe set, Shield of faith, Paladin tab shield, among some constant support mitigation. (companions ect. ect.) Healing word is active, bastion is used out of astral shield to heal the hits and party is using pots.
I'm not sure you'll get many replies with such a specific request here. Try searching for guilds in-game and check only the "drow" box. Haven't heard much about race-only guilds but you might get lucky. I must ask - why the specific request? Also, grjóthaus? nordic?