so you want to do a mission as part of a project? you need to do it on challenging. You set it up and go to matchmake and what happens???? No one is willing to join your group and you get endless invitations to a few other players groups. As far as I can tell it's because you only get the completion tick if the mission is done on your own map not if you join on someone else's group therefore no one is willing to give up group leader/ map status because everyone wants the project completion.
ubisoft state they are trying to promote players in groups...... not like this!!! each player regardless of who's map you are in should get the mission completion in their project otherwise matchmaking is a complete waste of time!!!!