But then someone goes and figures out that telepathy affects complex electrical patterns and suddenly you need to massively bulk up the bandwidth relative to the charge in order to stop your whole army from exploding due to an area-based *intense thoughts* burst. Or they bring in the telekinetics for a universal incoherence shield around hard armour, telekinetic sonar for universal mass detection, and the old randomiser for offence because it never takes much internal rearrangement to disable something. Meanwhile the hardcore nanotech is very basic, it is pretty much proteins, you gotta get lucky for it to do more than one thing, and control beyond a simple on/off switch is difficult, and even then typically requires physical exposure to a chemical. The more sophisticated stuff with multiple functions, such as both accumulating power and using that power to convert something simpler than itself into its own more-complex form, that, well, maybe if you had a really really good protein, but still, and then throwing in remote control, and coordination, and environmental tolerance(which is always difficult if you are too small for insulation...)... You are probably stuck with something visible. Honestly, grey goo is going to be crazy vulnerable to everything. You gotta be crazy thorough to get all of it, but if you have a target then destroying it is easy, just far too small to have any sort of shielding against anything. Now, sure, your giant robot made out of grey goo is going to be able to shield itself by converting goo into outer shielding layers, but a bomb going off in the middle of it is going to cost it a lot of mass and that level of sophistication is going to force your goo particles to be huge as far as grey goo goes. Of coursem you can get the whole "everything disintegrates on contact" thing with grey goo, but that is not going to remove the kinetic energy and it is going to be a massively insanely high-tech option, you would probably get F.T.L. relativistic projectiles first... At that point Team Psychic is going to have their premonition disciplines up so high that they can hit a thimble from orbit by hand with a single shot from an uzi...