Best Configuration for optimal cracking

[epixoip]

WPA is not LM or NTLM. What you are asking is practically impossible. You would need 2,362,609 Radeon 7970 GPUs to brute force WPA length 8 in less than 6 hours. And as brute force has exponential time complexity, you would need 570x more 7970s to brute force length 9.