I have seen a lot of people saying this boss is overtuned, too hard to escape fire circles, etc.
All you have to do is pay attention to the spawns of the adds. When adds spawn, there will be a “safe zone” at the location of the most recent spawn, so you can use that to predict where the fire circles are before they appear.
It’s not that hard to get 0 stacks in heavy armor regardless of RNG using this strategy.
That’s part of it, but part of it is you don’t have time to look for fire circles, find a safe zone, and run to it in heavy armor. So if you don’t know this strategy I posted, you may think it is overtuned.