(I think I have an addiction to Duerlusians)
Fre'tan death commandos are regarded as the most skilled, strong, devoted, and almost crazy warriors of the empire. There is hardly a type of warfare they haven't conducted and succeeded in, let alone being exposed to. Death commandos have mastered war entirely, with every type of warfare understood and able to be conducted by them. There is hardly a weapon that the Fre'tan can't take handle with deadly proficiency.
They are trained in the art of Ru'lima, which is a rather aggressive but efficient form of combat that basically turns your body into a weapon. They wish to get the full combat effect of their natural capability. even after their rifles run dry. Even after their blades go dull. They can still break someone's ribs and destroy their insides with a single, unimaginably powerful kick. They can decapitate someone's with their sharp claws. Even after their body is broken, theyll still be delivering deadly, painful, and poisonous bites.
Their suits are not heavily armored like Duerlusians. Instead, it amplifies their speed and acts as a life support/preservation device, usually keeping the warriors alive even after serious wounds. The blood markings often have a spiritual importance, just like most blood markings between imperial warriors. Most Fre'tan smoke spice before battle to enhance their combat efficiency and "help them crave battle, and shed any fear that dare cross their hardened minds." This is why you'll often see them on the battlefield with glowing blue eyes.