A: We’d say definitely yes, but the only caveat is that you have to remember to treat that one Keeper as if it were a Creeper (with FIVE zombies on it!) Since there will be so many Zombie Creepers in the mixed deck, you could just decide to take out the Zombies Keeper when you mix the decks. There would still be plenty of chances to fulfill any Zombie related Goals from Monster Fluxx, and then you wouldn’t have to remember to treat that one Keeper as a Creeper.