I have gotten one Outlaw Motif but I have not really grinded or farmed for them. I actually forget if it came from a Mob or a Boss or a Container. I would guess it is going to be more like Ancient Orc than Mecenary.
The reason Mercenary was so common is lots of people do Undaunted Pledges, not as many do the Hew's Bane Dailies.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"