yay, just killed giant spider with no-loss on impossible
It's quite easy with trolls and stone skins, but its such a long and repetitive fight.
I have a viking so i had to cast magic spring as well, but as a mage or skald its easier to get mana regeneration lvl 2 or 3 so you don't have to cast magic spring and just focus on stone skins so all trolls can attack the spider.
I had 2 trolls attacking and 1 was mana 'regenerator'