I think I had this quest easy, I teamed up with friends and one carried food and potions, one ran to and from the bank for more food and potions and the other one done the quest. We all took turns helping the others, which meant that while we were figuring out where to put the crystals we didn't have to worry about going back to the bank. We all trusted that the others would be there to help and the first one to complete the quest could give hints if we got really stuck. It worked for us even though it was still the hardest quest in the game. I think it was worse than recipie for disaster