I've not been one for the PvE queue missions before season 6, but as I've nearly finished playing through the storyline twice I thought I'd give them a go now that all the new fleet stuff has come out. I'm in a small fleet of myself and a couple of friends from the real world. To even build the basic starbase, we need to contribute 180 fleet marks for each division, however, every time I've taken part in a fleet action I've been awarded somewhere between 12-15 fleet marks. It didn't seem to matter if the team won or lost, it was always about that much. I'm the most active player in our fleet by far, and if this is about average for fleet marks per mission, it's going to take absolutely forever to get this thing built.