So, maybe some sub par DMing on my part but the party got sneaky and destroyed the jaw of the elder hag to muffle her screams then forced a dream pastry into her mouth... then tied her up using spider silk from the Druid... then dug a big hole under the windmill, dropped her in, and then come morning they destroyed the supports on the windmill to bring it down on her.

The other two had turned invisible during the fight, and then just when they were about to kill our druid, the druid nailed the perception check [I think she was a bear and negated the disadvantage] and then intimidated the fuck out of the hag sisters.

I could have done better with this encounter, but it was memorable. I'm picturing the windmill has somewhat reassembled itself and that the players can't be done with these creatures. For now, they are rolling an increasingly difficult wisdom save each long rest and failure means an exhaustion point.

So... How would you set up this encounter? What are the scorned hags going to do now?