Yeah you put your 4th or 5th best hitter in the #3 spot, optimally. They come up too often with the bases empty. The #4 spot seems ideal for Vlad. The expected run value of HR and 2B and 1B are all highest from the #4 spot in the order! So if you are optimizing you want your best power hitter, and best hitter for AVG, 4th. If anyone gets on base, he will come up with a man on in the first inning. The order of Biggio or Bo 1-2 really doesn't matter much but if Biggio ends up getting on base a lot more maybe he should lead off.
The Book says: your 3 best hitters should hit 1st, 2nd, and 4th; next two best hitters should hit 3rd and 5th; the worst 3 should hit 6th-9th in order.
https://books.google.ca/books?id=FrUYdXKZFZwC&pg=PA122&lpg=PA122&dq=the+book+optimal+lineup&source=bl&ots=Je6s3AbvGe&sig=ACfU3U1UAd2WIcJrum6q1XFMWufE99LGJg&hl=en&sa=X&ved=2ahUKEwjbhf619uDnAhXXs54KHfRrCzgQ6AEwDnoECAoQAQ#v=onepage&q=the%20book%20optimal%20lineup&f=false