You still kill Howl first. It's the equivalent to blocking the entire swarm and more than that on following rounds. If they never get her bonus they are worse off than taking a focus even with an extra dice. Then, if they decide to do it again next round you have even easier ties to kill. If they don't they wasted points a a trick pony hat wasn't actually a trick at all. It's still not good enough to make you consider shooting at anyone but Howlrunner first.
Ok, amazing swarm pilot totally fakes you out somehow... Then you still have an easier time killing his ties.
It really isn't giving you any advantage if your opponent can choose the same thing they were going to do anyway with the same results... You gave them better results.