I don't consider playing around in the IRC by threatening each other's characters with weapons we may or may not ever have to be "canon" so to speak =P

I say make them immune to EMP, but come up with some sort of signal, weapon, ray, whatever, that shuts down their power cores and forces lockdown, disabling their weapons and such. That seems like a reasonable weakness to me.

Also the fact that they are super fucking powerful is the reason why I only had my character kill one, and he had the advantage of being against a weak footsoldier.