I'm not sure if this has been done, or if it could be, and I know nothing about how one would do it but I thought it would be cool. Any CC I've used will lay down traps, but would it be possible to have them launch a fire trap for extra dps? It might be useful for multitarget aggroing/pvp. Just a thought.
I don't know what CC you're using, but FPSware's Hunter does precisely that. It puts the trap launcher into the normal attack rotation, and its amusing to watch. cheers, chinajade