"Warrior" will be assigned to new members as training/assessment or generalized warrior position. When our faction is increased in capacity, we should many warriors.
"Berserker" are small, fast and light and ready to die for their principal's and to break up the front lines and cause mayhem, you might also call them Kamikaze, against any standing force with self sacrifice allowing Viking Warriors to gain an advantage.
Berserkers are essential and integral for all Viking raids and defenses. The sight of a Berserker puts fear in enemy armies especially knowing that what follows is Viking Warrior brutes.
"Viking Warrior" are heavily armored soldiers, once the Bersekers have broken the primary defenses of an offending army, slow and heavy broad/long swordsmen march in for the kill. You can't make the final kill without these brutes and these are the soldiers that nail our enemies to the trees with their own swords.
"Dena Lagut" War command administers battles, these great war leaders can manage many enemies across several fronts at once. Had Germany had more people like these, we would be living in an entirely different world today.
"Valkyrie" The angles as it were, the great administrative spiritual beings who ultimately chose who lives and dies, who will lead men to greatness or condemn them if such men earn the wrath of the Valkyrie, when our faction has medical care ability, you will likely see the Valkyrie helping you out of the hospital.
The Valkyrie can both vengeful and kind, they love their people with all their heart and they are always watching over everybody.