Pre TS Shiryu was stronger than Yami BB (ID BB). Cover page shows Shiryu as No.2 so he is stronger than Aokiji who went extreme diff with FA Akainu. So Akainu and Shiryu are confirmed stronger than Aokiji. The last thing is I don't expect Akainu to be weaker than BB so they must also be relative to each other hence BB ~ Shiryu ~ Akainu, of course you can change the order any way you want.
I am just saying things can be argued this way.
I am just saying things can be argued this way.