Hmmm, I did kill them in the 2nd try and I made so much mistakes, because Iam new to D&D... The first time I got killed because I didnt knew they would come and my team was standing together...
2nd time was quite "easy", just bursted them down, without any tricks or further preperation. Most damage was from this, I dont remember the name, cleric melee magical skill, that hurts a lot