That is a tough fight in DKS; see
character help.
What level are you?
If you are not already playing on casual, have you tried lowering the difficulty?
Do you have any temporary start/armour boost potions? Before turning in the quest you may be able to teleport back to the battle tower to make some (after completing the quest the dragon stone might be disabled until the fight with the dragon terror patrol is over.
Welcome to the forum.
