Thanks to Dustin at TFN we now we have a third look at an Elite Praetorian Guard from Star Wars: The Last Jedi! You can also see Captain Phasma with the standard Executioner Stormtroopers in this shot too. I have seen the full photo of Phasma below and the Stormtroopers have the electric axes in their hands like Lumberjack Nick drew up from my notes. As you can see, Phasma has two Executioners with her.
Image Removed by Request.