I didn't do Viking style, but that's generally good advice for sword&board. They didn't do some of the more dangerous stuff, like shield hooking, and thrusts, and those are really light swords (For safety.) My specialty was Targe, and Claymore (Baskethilt, not "Braveheart" bastard) in the melee, Hanger, and Cinquedea, or Estoq for duels.