[Finalgenesis]

Some sort of goal or ends for the merc? I could imagine the motivation to play an active merc to be hard to maintain, as you don't really have any goal.

Maybe have 2 competing merc or something... or some way to introduce an agenda / win condition to the merc that makes sense... a random example might be merc wins if there is no clear winner by the end of year xxx, thematically that is because strife and conflict is good (and perhaps necessary) for the merc, this also give losing teams a slight boon as merc is more likely to give them a hand, so they can catch up easier and make for a closer game.