Been sick the last couple of days but I'm back just in time before the campaign ends.
I'm guessing there must not be a lot of people using the Mercenaries. Disney has enticed us with a free to play campaign with 1 defense and 2 challenge missions centered around the mercenary Gamorrean. If you enjoy winning with Gamorrean then you can hire him for everyday PvP attacks also, from the Mercenary Cantina. You must have Contrabands to hire mercenaries - they are fairly inexpensive once you have built the Cantina.
These missions are pretty straight forward.
Mission 1 - Defendhttp://youtu.be/0WLaSqqd-_M
Mission 2 - Challenge Mission
I got this on my first try.http://youtu.be/vnItJUzR3zw
Mission 3 - Challenge Mission
I got this on the second try.http://youtu.be/iogod2tNDAM
Missions 4+ - Replayable Campaign missions where you are gifted to 2 additional Gamorreans
I'm not on HQ8 yet so I'm usually content if I can get 2 stars.http://youtu.be/g-QoSqu99yk