Well, it would be profligate and a waste of time, but then that is what Aurvandil is about.
It's perfectly in character for Mendicant to let the Provincia fall, so he could come and conquer it again. Letting D'Hara take Paisly so he can arrive and declare "lol no" which would amuse him, particularly as D'Hara are so determined to keep Paisly.
