Winterfell was a very close call, despite the two fire dragons - only a last minute desperate move saved the day. Let's say that as the battle was starting, the Witch Melisandre casts a spell for more dragons.

By whatever, it reaches out and grabs the British dragon corps of the Temeraire universe. How does that alter the battle? Note that dragon fire still doesn't hurt the Night king but there are all the other abilities to use plus fire can be used on the Wights.

Can Temeraire's divine wind, clear the battle field, etc.?