If you're stuck and can't get past the two centaurs here's a workaround that narrows it down to one,if you're prepared to learn the head shot and adrenaline dodge,which is doable,it's a lot easier than doing it by the book.

Ignore any captions that say click to a time to skip the sped up time lapse before the boss match,that was for when it was two 15 minute you tube videos,i spliced them together and the time indicated is now wrong! :(