Note that the expression "wing down" wasn't used by me. With controlled slip the bank angle should not be more than 2 degrees. Haven't flown the 747 but otherwise have found controlled slip works for everything between DH82 and B767.
Just feel sorry for all the poor sods who have had their morale shattered by being told that "kick off drift" is the way to go. Let's face it, the word "kick" should not figure in the vocabulary of a professional pilot in connection with aeroplanes.