Which of the four stars from the september selection ticket is the best for bust looping?

>>532176626
>Well none of the Servants I want are buster so I'd really only benefit from the battery and the NP damage boost right?
Then find a servant you like who is buster, there is gonna be a 4 star servant selector in September/October. You can choose a buster from there. If there seriously no one you like here, then that's not a team issue, that's a (you) issue.