...also remember that it still might require several attempts to get the right "streakable" card layout. :-)

The key here is to USE the mummy cards... Try to end your streaks so that you ONLY flip your deck with mummy cards. Flipping your deck this way doesn't end your streak nor penalize you in any other way, such as re-covering chained or leaf cards. It is possible to beat, but in this case, boosters won't help, due to the score needed. By using the mummy cards to your advantage, you can streak the entire level & gain enough points to beat it. :-)