For some reason I am now having trouble with the DLC boss (nr 2?). The rejects or whatever it is called, been a day since I played it. First try got it down to 20%, messed up, died. Figured it would be an easy bossfight since it went so well on the first try. Then..... head met brick wall and I keep dying at 50%. Got it to 30ish % once, but died as I had chugged 20 vials. Tried probably 20 times now.
It's just a combination of things. Either I get hit by those Rom missiles they cast when they get to 4 up at once, or get chain stunned + hit by some AE, get stuck, unlucky dodge, etc. Feels like you have to be aggressive to keep them down, but at the same time dodge like mad to keep away from the spells that fly every which way. It seems so easy until one mistake turns it into a "omg, move move move, try to heal, aaaah, die".