All they have to do now is audit the Philly vote, not even the state. They will find plenty of fraudulent votes just in Philly to rightly call PA for Trump. That's all he needs.
Also, just focusing on Philly would make it efficient and timely, which is also key. We don't want let Biden stand as the President-elect for the next month or two. They can go audit the other states once PA is secured.