Inanch-Bilge
Well, why not leave Khergits and Sarranids as they're ? as outer threads to Viking controlled lands, after all Vikings would not feel comfortable at deserts or steppe
My suggestion is
Nords- Fully Viking culture
Swadia- Something like early Normandy may be, Viking military elite rules over Frank like peasants.
Vaegirs- Like Kiev I think, again Viking military elite rules over Slavic peasants.
Rhodok- Same, people would be something like Iberians or Italians I guess.
Armies of Swadia, Veagirs and Rhodok would be like, Viking nobles and proffessional retainers supported by local auxiliary.
Swadian peasants would provide spearmen, archers, crossbows and light medium lancer cavalry, all balanced.
Vaegir peasant would provide spears, archers and light cavalry, archers are relatively good, and some cavalry uses bow in average level.
Rhodok would provide good crossbows and spearmen but no cavalry.
My suggestion is
Nords- Fully Viking culture
Swadia- Something like early Normandy may be, Viking military elite rules over Frank like peasants.
Vaegirs- Like Kiev I think, again Viking military elite rules over Slavic peasants.
Rhodok- Same, people would be something like Iberians or Italians I guess.
Armies of Swadia, Veagirs and Rhodok would be like, Viking nobles and proffessional retainers supported by local auxiliary.
Swadian peasants would provide spearmen, archers, crossbows and light medium lancer cavalry, all balanced.
Vaegir peasant would provide spears, archers and light cavalry, archers are relatively good, and some cavalry uses bow in average level.
Rhodok would provide good crossbows and spearmen but no cavalry.