While I fully agree with your take here adoomgod, I think referencing a completely OP build (giga-damage Harbinger Mystic) to show how easy the fight is might be a bit disingenuous.
@the8anarchist made an excellent video on how to easily defeat Beronath with a low Health Ember’thil Pyromancer that is highly educational for people struggling with this fight.
Defeating Beronath is not difficult by any means and I think it shouldn’t be changed at all except fixing the old TQ lightning bug that has been identified.