So you are doing the “Fall of the Outcasts” Timeline?
The level of your character and the area level does make a small difference (in terms of enemy health mostly), but still it’s a very mechanical fight.
You need to understand and execute the mechancis properly, i just explained this fight to another fellow new player.
Here is where i do explain that fight:
I really do prefer those mechanical fights over pure gear checks, that you can face tank. (And you could even face tank this boss if you want to)
If you are still having issues beating it, give us some more details of your build.
The difficulty level of this fight is not super high to be honest.
There will come bosses that need faster reflexes and more precision in dodging