Boss fights are WAY overtuned

You do just have to treat this like a souls game.

Its just so disappointing that the devs got so focused on this stupid soulslike trend that they didn't care at all about the existing fan base. But yeah, I did use the term "diet soulslike" in one of my replies because this certainly isn't as intense, but like you said this isn't dragon age. 

I don't know what red mage is but I'm guessing you meant spellblade, which is the spec I'm playing. I did have my workshop as upgraded as I was able and same for all my gear and my party's gear. And I'm not like "pro level gamer" or whatever, but I'm also not bad at it, I switch most games to hardmode once I figure out what I'm doing and how the mechanics work without much issue. There really does seem to be a major tuning issue. Here's what I said in a reply a few mins ago:

I did end up using custom settings to turn down enemy dmg, health, and aggression to the lowest setting which barely made corius survivable, and that honestly made me wonder if the enemy aggression setting is even working as intended. The frequency of attacks did not slow down one bit; I still ended up getting stunlocked a couple times and only finished the fight because the boss wasn't hitting as hard.

I am really hoping something just isn't working correctly and it gets fixed, because I would hate to think that this is the new direction of this series which I have loved so much since origins came out.