I was stuck here to until i read the bestiary. Yarden is your friend here and using your potions can makes things easier. Tawny Owl is particulary effective so you can keep using Yarden and quen for when you do get hit. This would be extremely difficult without signs however once you know when and how to use them it becomes a hell of a lot easier. So just use Yarden, hold block and let it slow the wraith's, dodge before they hit you and strike. Just try not to get surrounded. Hope that helps
Thanks, I'll persevere. Must use block more, don't tend to at the moment, I usually try and dodge attacks.