“Best” all around axle ratio: ~450hp w/ A904?

Like every other thread of this type, the answer is subjective. That’s because the question is subjective.

“All around” means what? All around town? All around with mostly freeway driving? All around with more emphasis on track numbers?

And then you have the issue of what some will live with. Some think any engine cruising about 2200 rpm is abusing it. Others think 70 MPH at 3800 rpm is no big deal.

So the answer is twofold. No one can know what the OP needs because he would have to clean up his question and be more definitive of what he wants and what he can live with.

Part 2 is the math never fails. For a given tire diameter, gear ratio and rpm there is an exact mph. The math isn’t wrong and it doesn’t lie.

If any part of the above equation doesn’t match what the math says you have a junk tach (there are many junk tachs out there) or the method of measuring mph is faulty.
...or the converter slip is excessive, or the trans is worn out, or the clutch is slipping, or....