You brought up a good point, but there are two problems with your reasoning:
A) The Queen is powerful enough to defy her natural element. Tastiadan was they only other shadowling that can do that. And I doubt another shadowling will take their place as that powerful.
B) The Queen would probably make the ghosts attack you if they were helping her.
A) The Queen is powerful enough to defy her natural element. Tastiadan was they only other shadowling that can do that. And I doubt another shadowling will take their place as that powerful.
B) The Queen would probably make the ghosts attack you if they were helping her.