This is called a Mechanics check. It is the first time players are introduced to "you're going to keep failing until you realize the boss has things you need to learn to control."
This fight is extremely easy and I explain it to every tank and dps when I come to it on my alt healer. Mind you I have NO birthright gear or hand me downs.
1) tank goes left group goes right. The boss almost always starts with a cone AOE.
2) tank against wall, never move.
3) dps and healer avoid AoE.
4) Dps kill adds.
5) Healer heals.
It's really simple actually, and even in groups I thought the tank was brain dead - they listen. In fact every time I explain the fight we 1 shot it and whenever I don't we fail... So now I always explain the fight