Hello there,
you have my attention. Nordic Bronze Age is a very nice, but also peculiar period, and IMhO many of the systems a) lack the ritualistic aspect of tribal warfare and b) are completely wrong on the organizational and technological side.
I actually don’t know a good set, but you might want to use GW‘s Lord of the Rings, which has a suitable selection of profiles that can be easily done and doesn’t need formed units. Chariot rules iirc are in the Easterling book (hopefully, but I can’t confirm it, all should be compiled in the Hobbit book).
Another extra is the way heroes work who have resources allowing to give orders and modify dice rolls.