The best way to beat it without having to restart and upgrade your weapons is to have patience and block alot. Get a few hits then block use your magic whenever possible the second and third levels are easy, it's just the first with the witches and gorgons that is the hardest also use alot of freezing with the amulet and the orkos stone comes in handy .
Thanks all for all the helpful tips. When i did my first play through on normal. i was stuck on this part for atleast 30-45 minutes. Now on my first playthrough on hard. i completed it on my first try within 5-10 minutes tops.. I was worried about this part when i got to it but it was super easy second time around now that i had way more experience with the game. @BLK . block is so bad , i havent used it once on my hard playthrough. soon as the trails start use your amulet and oath stone..then go straight into destruction of ares x2. roll around till your oath stone/amulet is off cool again and repeat. hack and slash them till red pops over their head. grapple and refill magic. I went to the second floor with more than half health and full magic. did the same thing for second and third level.