as I recall, TCDs don't use energy to fire. The balance, therefore, would be to make these missiles take energy to fire (is this possible?) and have them get blown up easily by TCDs. That way an opponent can TCD these missiles, which will blow up near the launcher, draining his shields and energy, until he cannot fire the missiles anymore.
Actually, all missiles taking a bit of energy to fire would be great. Perhaps double the amount that mines need to fire?