Ah, I have a totally different understanding of the spell. As I understand it, it wasn't a set of instructions but rather an influence of Jillian's decision-making. Every time she had to make a decision, she was influenced (not forced, though) to decide in whatever way was best for Wanda.
To put it another way, the spell magnified the biases that people have to help and protect the ones they love. That's why Wanda was so incensed when she told Sizemore that he didn't understand the underpinnings of the spell; the underpinnings were Jillian's feelings for Wanda, which by questioning the spell, the others were inadvertently dismissing.
Then again, I'm the guy who claimed that there never was a spell and it was just Wanda's cover story.