My strategy included:
- use many "Finding Rare Treasure"
- try building one single large stack by keeping that dreamer asleep with "FloatingThrough Space" (don't worry too much about the other dreams, finish them fast)
- play many "Flying" on the large stack
- use "Climbing a mountain" on the large stack
- nightmares are only a problem for the small stacks, so I try to finish them before the nightmare reaches the end
- however we want some nightmares to reach the end in order to not finish the large stack. We want that alive as long as we can
- if we do have to finish the large stack to avoid waking up, we will start a new large stack after that