Some fighting tips that worked for me

Finished the game last night. Amazing in every sense. Loved it.

I suffered a lot at the beginning with bosses, but game gets a bit easier after leveling (40+) and I realized with many bosses you HAVE to play aggresively.

Big bosses, try to get under their feet. At all times. It trivializes the fight. The last boss of the game, took me 3 tries being aggresive and trying to stay under him. Less than 5 also for the dragon emperor doing this.

Eternal Glory: For this one I cheesed it a bit. Basically stayed mid-long range waiting for him to do the spear attack. Dodge-dodge-dodge and when behind obliterate. In second phase ONE MORE DODGE (shadow).

Bo Magus/sorcerer: For this boss I had to be a bit more patient. But learning the patterns when on the ground, pretty easy to find the way to backstab and obliterate.

All in all, when playing "cowardly" I lost a ton. Being aggresive pays way more. With some exceptions of course.