Subject says it all. The Recruit quest for D'Vinn has, as its second job slot, Spy(5) - bonuses: Dark Elf, Rogue, Agile, Attractive. D'Vinn is the only Spy(5), so no other agent can do the job, let alone get all the bonuses. I think that this isn't the only Iconic recruit quest that needs the agent being recruited to fill all the bonuses for a slot, either, but it is the only one I've come across so far that can't even be done if you don't already have that agent.
If you have to USE the thing you're trying to get in order to GET the thing you're trying to get, that's called a design flaw...also known as idiocy.