what kinda concepts do you have in store?
I thought it would be funny to create an apostate who specialises in minions. His minions would be xenos types of the most bizarre variety, stored in cages that look like iron balls. He would then throw one or more of those balls before a fight to release a specialised minion. After some time, those minions could be upgraded to better minions of course, and he would need the survival skill to hunt down new xenos species to create even more minions.
He could then search for other handlers and challenge them to a Minion -Fight. Winner get's a minion of the opponent (of course you would have to buy that with exp).