i'll be dead honest. i think a trader can benefit from a guard paraphernalia rather than a unit.
what do traders need unit for? stop random npc from robbing their gold?
getting arrested by hostile realm? well.. if they want to go to hostile realm, they can bring a unit to avoid that! guards shouldn't stand a chance
can't think of anything else.
I would like this. Units just go get themselves killed against rogues.