I'm not all to willing to continue arguing, so I'll let this be my final post on the matter.

Men clad in black steel, a super alloy, from head to toe, cannot be killed. It's as easy as that. Sure, they can be hit with a giant arrow from a ballista, but no human would ever be able to cut through this super alloy with any weapons of sane qualities. I don't care if they can know fear and route should the pressure apply itself, or if they can be killed by ballista shots- the reason is that you shouldn't have to face an enemy that 'knows no fear, and can defeat all evil', the fact that they can only be logically attacked by some super mage is kinda.

I don't want to be a tau soldier without access to long-range weaponry and fight a space marine of the ultramarines.

If you don't understand the metaphor then I will rephrase.

Samurai versus roman legioneer with access to a knights plate armor, but instead of plate it's made of steel and he has a giant tower shield to boot. Sure he can't move as well as my samurai can, but who said he'd need to since he's got access to a mace of insane might he can probably just wing it until he's hit my samurai, at which point he'll instantly fall to his knees.

Sure there are joints, but no sane man, nor logical arrow would kill anyone via those.

But in the worst case I'll just say that my swords can cut through wood like the katana cut through flesh.

Edit: For the sake of clarity, I have nothing against your deity. I think he's cool and all but your nation is what is worrying me man.