Strategic Planning is great, I've had loads of success with it. On the base set finale the other week, the Rebels burst in to a room where Elite royal guard were deployed. They killed one and seriously injured and stunned the other, rendering the group useless. With this card I was able to activate my HK Assassin droids a second time, whilst the Rebels had used a lot of resources on the royal guard.
Then of course, they had to still kill the royal guard or I could do the same thing next turn!