I'm slightly confused too - though I'm not adverse to the idea of a 'swarm' merc. The problem is we have no system for that. We don't have any code in place that makes something act like a swarm in a way that would make it a unique mercenary aside from it being called "a swarm of x".
If the latter is the goal, I'd rather leave that up to an area author to create. If the former, that's a big system to craft up and more than a Santa wish can survive.
