Hi, party are good but i think it would be good to add a classic drag selection that is present in every strategy games, i’m don’t know if i’m clear (if i’m not look this picture: http://www.codeproject.com/KB/WPF/SimpleDragSelection/SimpleDragSelection1.png).
I think that you can be more reactive and specific with this system in complement of parties system because you can select only one guy and tell him to go there.