When Sleigh goes first I think Whitebeard would “hohoho” the Locker into missing her turn (unless the controller guessed wrong which ship to lock up), in which case I think DJ wouldn’t be able to copy Whitebeard and freeze the Sleigh.
The work around for that might be to use Behemoth, and not rely on a crew to copy the ability, unless Behemoth can’t copy anything on a skipped turn…..