What should be the role of the Unsullied in the future? (Patreon)

Unsullied are nearly 7000 strong. They are very good foot soldiers. Some might even say they are the best. So, their training and cohesion could be passed down to Westerosi armies in the future. So, some would retire and become trainers for the Westerosi armies. However, there are a lot of Unsullied soldiers with nothing else to do. 

What would you prefer for their role in the future?