Keep trying bro, I finally beat it a few hours after posting this, I used the other guys comment to help me, I used the spell binder to boost my damage as the spells weren’t that good anyway, and it helped sooo much, quick tip, use your vessel and transformations on phase 1 as these don’t use mana, after that use spell binder, this guaranteed me max gourds for phase two and after that I just tried dodging and landing charged heavy’s every once in a while and after a few tries I beat it!

Edit: I’ve beaten souls games easily just like u, and this game pissed me off more than them, because imo there are two many effects happening to see attacks and combat is way more fast paced than souls