Hey you sound like you know your history. Good work. Obviously I understand that even the Natives are like a speculative fiction, if this happened how would things happen type. Which I think is great.
I understand what you trying to do. Good work.
I would speculate that Vaegirs based on Rus or Vikings that settled on Ladoga and united Slav tribes into Novgorod Rus. And Rhodoks i think remind me of Livonian order, or Lithvenian knights in the same time period. I am originally from Russia and I used to do historical reenacting, which gave me a brief idea of what was going on in medial warfare. Which brings me to a point where I would like to suggest something. U know how usually in battle in Native, when you tell your soldiersthem to hold the ground, the soldiers spread as wide as f@ck)) Anyways would have been cool if you could tell them to look the shields and actually create a shield wall. (as a first row), and have spear mean or long axe man to attack the enemy heads from second row. Trust me this technic works very good in real life))) Of cos got some doubts that it is possible to script them like that, but it would have been a real shield wall then. What you think.
All the best.