There's not much point to using it until level 54, when you get Empyreal Arrow which requires that Wanderer's Minuet be up. From that point onward, I'd generally assume that you'll always be using Wanderer's Minuet unless there's a specific dungeon mechanic going on where you need to move around constantly. And as they indicated above, you can actually move around a fair amount even when you are using it. You can start moving about halfway through the cast time without interrupting your shot, and you have lots of abilities that can still be executed on the move.