Given that if we match Fulham's result - we're up. If Reading match Birmingham's result - they're safe (irrespective of how Barnsley or Burton do).
Simple then - just make sure both benches are keeping a close watch on events at St Andrews and instruct their teams match them goal for goal. If Fulham score, Reading immediately let us walk one in. If Brum score we return the compliment. Of course both sides would need quite a few long injury stops to make sure there's at least 12 minutes injury time at the end so that there's time to cancel out any very late goal at Birmingham.
We could always promise Reading that if they agree to this we would spend say £10million of our new vast fortune to buy their worst player as nominated by them.
Job done !